Counter-terrorism officers have arrested a 50-year-old man at Heathrow airport as he got off a plane from the Egyptian capital, Cairo, The Guardian reported.
The man was arrested under section 58 of the Terrorism Act 2000 on suspicion of “possession of articles containing information of a kind likely to be useful to a person committing or preparing an act of terrorism”.
As part of the investigation, officers are searching a residential address in north London, Scotland Yard said.
The force added: “The arrest was pre-planned and not in response to any immediate danger but as part of an ongoing investigation into allegations of terrorist activities overseas. This arrest is not related to Isis or Syria.”