Detectives from the Anti-Terrorist Branch arrested the man in the Dewsbury area of West Yorkshire, on suspicion of the commission, preparation or instigation of acts of terrorism under the Terrorism Act 2000.
The man is being questioned at a West Yorkshire police station, while two residential addresses are being searched in connection with the investigation. Scotland Yard said he was arrested on Saturday night following comments made in the News of the World.
The newspaper is understood to have passed on an interview with a man they name as Imran Patel to police involved in the investigation. Mr Patel, believed to be an auditor in Leeds, is reported to have had military training in Pakistan.
He allegedly told the newspaper he met the bombers who carried out the attacks that injured 700 people; Mohammad Sidique Khan, age 30, Shahzad Tanweer, age 22, Germaine Lindsay, age 19, and Hasib Hussain, age 18, in Dewsbury after he returned to the UK.
Patel claimed Khan tried to persuade him to join the bombers, and held talks about their "mission" to carry out terrorist attacks.
Mr Patel decided not to join them but did not tip off police about their intentions. n Anti-terrorist police have been given more time to question three men who were arrested on suspicion of plotting or preparing acts of terrorism after late-night raids on three homes in Kent and London.Reuse content