Police have released a CCTV image of a suspect they want to speak to after two homeless men were attacked in central London.
Officers were called to Victoria Street, close to Artillery Row, Westminster, at around 4.30 am on Thursday after receiving reports a rough sleeper had been attacked by two men.
The London Ambulance Service also attended.
A 44-year-old man was taken to a south London hospital where he remains in a critical condition.
After checking CCTV footage, one of the men was identified as having been in the area of a second assault on a homeless man outside Waterloo Railway Station approximately two hours after the Westminster attack.
During this assault, a 32-year-old man suffered head injuries.
He attended a south London hospital where he remains in a stable condition.
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Detectives have released CCTV images of a man they wish to identify and speak with in connection with the assault on Victoria Street.
He is described as white and wearing a dark blue jacket, blue trousers and white trainers.
A 34-year-old man has been charged in connection with the assault at Waterloo.