Armed police have led an operation to arrest a 20-year-old man on suspicion of plotting terrorist acts, Scotland Yard said.

The suspect was arrested in north-west London at around 6.30pm on Thursday.

Counter-terrorism officers from the Metropolitan police were assisted by the firearms command during the pre-planned operation, the force said. Nobody was injured.

The man, who is from north-west London, is being held on suspicion of preparing terrorist acts, contrary to section 5 of the Terrorism Act 2006.

He is in custody at a south London police station, the Met said.