Deadly blast at Ariana Grande concert in Manchester, England

British security forces raided an apartment building on May 24 in central Manchester as they investigated “a network” of people allegedly behind the city’s concert bombing. Hundreds of soldiers were sent to secure key sites across the country, including Buckingham Palace and the British Parliament at Westminster.

Home Secretary Amber Rudd said the bomber, Salman Abedi, “likely” did not act alone when he killed 22 people and wounded scores at an Ariana Grande concert Monday night, May 22, in Manchester. She said he had been known to security forces “up to a point.”

Abedi, a 22-year-old British citizen born to Libyan parents who grew up around Manchester, died in the attack. (AP)

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Deadly blast at Ariana Grande concert in Manchester, England

People look at flowers and tributes left in St Ann’s Square in Manchester, England, Monday May 29, 2017, exactly a week after the Manchester Arena terror attack took place. Over 20 people were killed in the blast with many more injured. (Owen Humphreys/PA via AP)

Salman Abedi is seen on he night he committed the attack in Manchester

A worker bee adorns the side of Bollington White Nancy to remember those killed and injured in the Manchester Arena attack, on May 30, 2017 in Macclesfield, England. White Nancy overlooks the hills and countryside in East Chesire with views across the plain to Manchester and can be seen for miles. White Nancy was built in 1815 as a summer house, and memorial to the the battle of Waterloo. An explosion occurred at Manchester Arena on the evening of May 22, Killing 22 and injuring many more. (Christopher Furlong/Getty Images)

Deadly blast at Ariana Grande concert in Manchester, England

People hold a minute of silence in a square in central Manchester, England, Thursday, May 25, 2017, after the suicide attack at an Ariana Grande concert that left more than 20 people dead and many more injured, as it ended on Monday night at the Manchester Arena. (AP Photo/Emilio Morenatti)

Deadly blast at Ariana Grande concert in Manchester, England

Britain’s Queen Elizabeth II, right, speaks to Amy Barlow, 12, from Rawtenstall, Lancashire, left, and her mother, Kathy, as she visits the Royal Manchester Children’s Hospital in Manchester England, to meet victims of the terror attack in the city earlier this week and to thank members of staff who treated them Thursday May 25, 2017. (Peter Byrne/Pool via AP)

Deadly blast at Ariana Grande concert in Manchester, England

Manchester Arena bomber, Salman Abedi (handout)

Salman Abedi is seen on he night he committed the attack in Manchester

CCTV image of Salman Abedi in an unknown location of the city center in Manchester, England on May 22, 2017. (Greater Manchester Police via AP)

Salman Abedi is seen on he night he committed the attack in Manchester

Salman Abedi, the bomber behind the Manchester suicide bombing, is seen in this image taken from CCTV on the night he committed the attack in this handout photo released to Reuters on May 27, 2017. (Greater Manchester Police/Handout via Reuters)

Deadly blast at Ariana Grande concert in Manchester, England

An armed soldier and an armed police officer patrol outside the Houses of Parliament on May 24, 2017 in London, England. 984 military personnel are being deployed around the country as the UK terror status is elevated to Critical in the wake of the Manchester Arena Terror Attack which took place on Monday night. (Carl Court/Getty Images)

Deadly blast at Ariana Grande concert in Manchester, England

A woman picks a newspaper reporting the news on the suicide attack at a concert by Ariana Grande that killed more than 20 people as it ended Monday night in central Manchester, Britain, Wednesday, May 24, 2017. (AP Photo/Emilio Morenatti)

Deadly blast at Ariana Grande concert in Manchester, England

Thousands of people across the country have paid tribute to the victims of the attack.

Deadly blast at Ariana Grande concert in Manchester, England

Armed police officers patrol a police cordon near the Manchester Arena in Manchester, Wednesday, May 24, 2017. Britons will find armed troops at vital locations Wednesday after the official threat level was raised to its highest point following a suicide bombing that killed more than 20, as new details emerged about the bomber. (AP Photo/Kirsty Wigglesworth)

Deadly blast at Ariana Grande concert in Manchester, England

People stand by flowers offered for the victims of a suicide attack at a concert by Ariana Grande that killed more than 20 people Monday night in central Manchester, Britain, Wednesday, May 24, 2017. (AP Photo/Emilio Morenatti)

Deadly blast at Ariana Grande concert in Manchester, England

Members of the public pause to look at floral tributes and messages as the working day begins on May 24, 2017 in Manchester, England. (Jeff J Mitchell/Getty Images)

Deadly blast at Ariana Grande concert in Manchester, England

People pray after a vigil in Albert Square, Manchester, England, Tuesday May 23, 2017, the day after the suicide attack at an Ariana Grande concert that left 22 people dead as it ended on Monday night. (AP Photo/Emilio Morenatti)

Deadly blast at Ariana Grande concert in Manchester, England

People attendn a vigil for the victims of an attack on concert goers at Manchester Arena, in central Manchester, Britain on May 23, 2017. (Jon Super/Reuters)

Deadly blast at Ariana Grande concert in Manchester, England

People attend a vigil in Albert Square, Manchester, England, Tuesday May 23, 2017, the day after the suicide attack at an Ariana Grande concert that left 22 people dead as it ended on Monday night. (AP Photo/Kirsty Wigglesworth)

Deadly blast at Ariana Grande concert in Manchester, England

Greater Manchester Police Chief Constable Ian Hopkins speaks to the media in Manchester Tuesday May 23, 2017. Police say they are treating an explosion at an Ariana Grande concert in northern England as terrorism. (Peter Byrne/PA via AP)

Deadly blast at Ariana Grande concert in Manchester, England

A woman holds a placard as they take part in a vigil for the victims of an attack on concert goers at Manchester Arena, in central Manchester, Britain on May 23, 2017. (Peter Nicholls/Reuters)

Deadly blast at Ariana Grande concert in Manchester, England

A man stands inside Didsbury mosque in Manchester, Britain on May 23, 2017. (Stefan Wermuth/Reuters)

Deadly blast at Ariana Grande concert in Manchester, England

Police officers stand outside a residential property near to where a man was arrested in the Chorlton area of Manchester, Britain on May 23, 2017. (Stefan Wermuth/Reuters)

Deadly blast at Ariana Grande concert in Manchester, England

A woman lays flowers for the victims of the Manchester Arena attack, in central Manchester, Britain on May 23, 2017. (Darren Staples/Reuters)

Deadly blast at Ariana Grande concert in Manchester, England

Police forensic investigators search the property of Salmon Abedi England, Tuesday, May 23, 2017. Official records show that Salmon Abedi was registered as living at the Manchester house raided by armed police investigating Monday night’s deadly concert blast. The electoral register shows that Abedi – named by U.S. officials as the suspect in the suicide bombing at an Ariana Grande concert – lived at the house in Fallowfield in southern Manchester where police carried out a controlled explosion Tuesday. (Danny Lawson/PA via AP)

Deadly blast at Ariana Grande concert in Manchester, England

Police investigators work at residential property in south Manchester, Britain on May 23, 2017. (Stefan Wermuth/Reuters)

Deadly blast at Ariana Grande concert in Manchester, England

Mounted police officers on patrol in Manchester, England, Tuesday May 23, 2017, the day after the suicide attack at an Ariana Grande concert that left 22 people dead as it ended on Monday night. (AP Photo/Emilio Morenatti)

Deadly blast at Ariana Grande concert in Manchester, England

A woman waits to take part in a vigil for the victims of an attack on concert goers at Manchester Arena, in central Manchester, Britain on May 23, 2017. (Darren Staples/Reuters)

Deadly blast at Ariana Grande concert in Manchester, England

Queen Elizabeth II and Prince Philip, Duke of Edinburgh observe a minute’s silence in honour of the victims of the attack at Manchester Arena at the start of a garden party at Buckingham Palace on May 23, 2017 in London, England. (Dominic Lipinski – WPA Pool/Getty Images)

Deadly blast at Ariana Grande concert in Manchester, England

A man walks past a sign in Manchester, Britain on May 23, 2017. (Stefan Wermuth/Reuters)

Deadly blast at Ariana Grande concert in Manchester, England

Armed and uniformed police officers stand outside a residential property near to where a man was arrested in the Chorlton area of Manchester, Britain on May 23, 2017. (Stefan Wermuth/Reuters)

Deadly blast at Ariana Grande concert in Manchester, England

The Union flag flies at half mast above the Department for Culture Media and Sport on Whitehall on May 23, 2017 in London, England. (Jack Taylor/Getty Images)

Deadly blast at Ariana Grande concert in Manchester, England

A man writes a message on the pavement in central Manchester, Britain on May 23, 2017. (Darren Staples/Reuters)

Deadly blast at Ariana Grande concert in Manchester, England

Armed police patrol near Manchester Arena following a deadly terror attack in Manchester, northwest England on May 23, 2017. (Oli Scarff/AFP/Getty Images)

Deadly blast at Ariana Grande concert in Manchester, England

People affected by the deadly terror attack at Manchester Arena look out from a hotel window in Manchester, northwest England on May 23, 2017. (Oli Scarff/AFP/Getty Images)

Deadly blast at Ariana Grande concert in Manchester, England

A woman and a young girl wearing a t-shirt of U.S. singer Ariana Grande talks to police near Manchester Arena following a deadly terror attack in Manchester, northwest England on May 23, 2017. (Oli Scarff/AFP/Getty Images)

Deadly blast at Ariana Grande concert in Manchester, England

The first floral tributes to the victims of the terrorist attack are placed on the empty streets on Shudehill, May 23, 2017 in Manchester, England. (Christopher Furlong/Getty Images)

Deadly blast at Ariana Grande concert in Manchester, England

Crowds of people wait outside after police avacuated the Arndale Centre on May 23, 2017 in Manchester, England. (Christopher Furlong/Getty Images)

Deadly blast at Ariana Grande concert in Manchester, England

A man carries a young girl on his shoulders near Victoria station in Manchester, northwest England on May 23, 2017. (Oli Scarff/AFP/Getty Images)

Deadly blast at Ariana Grande concert in Manchester, England

A Manchester Evening News vendor sells newspapers showing headlines from the terrorist attack on May 23, 2017 in Manchester, England. (Leon Neal/Getty Images)

Deadly blast at Ariana Grande concert in Manchester, England

Police forensic officers leave the Manchester Arena as they investigate the scene of an explosion on May 23, 2017 in Manchester, England. (Dave Thompson/Getty Images)

Deadly blast at Ariana Grande concert in Manchester, England

Ariana Grande concert attendees Karen Moore and her daughter Molly Steed, aged 14, from Derby, leave the Park Inn where they were given refuge after last nights explosion at Manchester Arena on May 23, 2017 in Manchester, England. (Christopher Furlong/Getty Images)

Deadly blast at Ariana Grande concert in Manchester, England

Police guard close to the Manchester Arena in Manchester, Britain, Tuesday May 23, 2017, a day after an explosion. (Peter Byrne/PA via AP)

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