A man who was arrested at a UK airport under the Terrorism Act has been released on bail, police said.
The 22-year-old was arrested at Birmingham International Airport on Monday night.
A West Midlands Police spokesman said he was held on suspicion of being in possession of a document likely to be of use to a person committing or preparing an act of terrorism.
The overseas student, who is studying in the UK, was detained following a stop under Schedule 7 legislation after he arrived on a flight from Dubai.
He was subsequently arrested and taken to a local station.
The man, who police said is a Pakistani national and studying in the UK at a "fully accredited institution", has been released on police bail while inquiries continue.
A police spokesman added: "The arrest was not as a result of any ongoing investigation and there was no immediate threat to the public."