Two men have been arrested at Heathrow on suspicion of terrorism offences linked to activities in Syria.
The pair, both aged 21 and from Birmingham, were detained at the airport at around 3.30pm on Monday after arriving back in the UK on a flight from Turkey, West Midlands police said.
Detectives believe the men, from the Handsworth area, travelled to Syria in May last year.
Unarmed officers detained the men, who are now being questioned in the West Midlands, as they disembarked.
Detective Chief Superintendent Kenny Bell, head of the West Midlands counter-terrorsim unit, said: “We took action this afternoon in order to ensure we can properly understand what activities these men have been engaged in whilst in Syria, not because they posed any imminent threat to the public.”
In its statement confirming the arrests, the West Midlands force urged anyone thinking of travelling to Syria to heed warnings issued by the Foreign and Commonwealth Office.