A 19-year-old man has been arrested at Heathrow airport on suspicion of preparing for acts of terrorism.
He was detained by officers from the West Midlands counter-terrorism unit at 1500 GMT on Thursday as he got off a plane from Jordan, police said in a statement on Saturday.
The suspect, from Coventry, did not pose any risk to the flight, West Midlands police said. The arrest was pre-planned and intelligence-led.
The man is in custody in the West Midlands area.