Counter-terrorism police have arrested three men on suspicion of supplying forged documents, Scotland Yard said late Saturday. The men arrested are aged 28, 33 and 30 and are in custody at a central London police station.
Officers are still searching two residential addresses in London and have finished searching another location in the East Midlands.
Police facing a rising tide of Islamic radicalisation fuelled by the conflict in Syria and Iraq have made a string of arrests in recent days.
Britain’s parliament is currently debating new anti-terrorism legislation proposed by the government.
The draft laws would give the authorities the power to relocate people identified as Muslim radicals, force universities to bar extremist preachers and toughen laws against would-be jihadists planning to leave for Iraq and Syria as well as those returning.