Two men have been arrested on suspicion of terrorism offences relating to activities in Syria, police said tonight.
West Midlands Police said the pair, both aged 21 and from Birmingham, were detained at Heathrow Airport at around 3.30pm today after arriving back in the UK on a flight from Turkey.
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 at Heathrow.
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, t he West Midlands force urged anyone thinking of travelling to Syria to heed warnings issued by the Foreign and Commonwealth Office.