A man has been questioned by counter-terrorism police over three Britons who secretly went to fight in Syria.
The 19-year-old from Coventry was held on suspicion of failing to disclose information about acts of terrorism.
Ali Kalantar, Mohammed Ismail and Rashid Amani, all from the city, were believed to be engaged in the conflict. Kalantar and Amani have since been reported killed, police said.
West Midlands Counter Terrorism Unit officers have bailed the man.
He was arrested on Wednesday on suspicion of failing to disclose information about acts of terrorism over the disappearance of the three men, who travelled to the Middle Eastern country in March last year, West Midlands Police said.
The force said the man was questioned under section 38 of the Terrorism Act 2000, thought there was no risk to the public.
