Police have arrested a British man suspected of being an ISIS terrorist at the entrance of the Channel Tunnel in France.
He was arrested on Wednesday within the British control zone in Coquelles, France, by officers from the MPS Counter Terrorism Command.
London-based advocacy group CAGE have insisted the man is actually a British aid worker.
A Met spokesman said: “He was arrested on suspicion of preparing for terrorist acts (under section 5 of the Terrorism Act 2006) and membership of a proscribed organisation (under section 11 of the Terrorism Act 2000) and detained under Police and Criminal Evidence (PACE) powers.
“Whilst in police custody, he was subsequently detained under the Terrorism Act 2000.
“A warrant of further detention was obtained today, at Westminster Magistrates’ Court, allowing police to keep the man in custody until Tuesday, 4 May.
“The arrest relates to alleged activity in Syria. Enquiries continue.”
The force refused to comment further on the man’s identity, his arrest or where he was travelling from.
Around 5,000 European citizens travelled to Iraq and Syria as “foreign fighters” over the years of which roughly 800 are British. Of these approximately 20 per cent are women and children.