BRITAIN'S internal counter-intelligence and security agency, MI5, has warned Scotland Yard that policemen in its ranks were suspected of attending terrorist training camps.

The policemen all lost their jobs when their security clearance was revoked by senior officers after checks carried out because of fears of ''sleepers''.

The case is so sensitive that it is being heard by a security-vetted judge. Credit:Reuters

London's Sunday Telegraph reported that one of the men, Abdul Rahman, had been a constable for almost three years when MI5 warned that he might have been at a training camp in Pakistan. He resigned rather than be dismissed and is now suing Scotland Yard for compensation. He says he is entirely innocent and has never been to a terrorist training camp.

His lawyers say he has never been questioned, arrested or charged under terrorism legislation. Mr Rahman, 33, is the first British policeman ever disclosed to have failed counter-terrorism checks.