A teenager has been arrested on suspicion of terrorism offences, police said.
Officers from the Metropolitan Police's Counter Terrorism Command arrested the 18-year-old at an address in south London on Wednesday.
Following the arrest, police are searching two addresses in south and south east London in connection to their investigation.
The location of the addresses have not been revealed.
Police said the teen has been taken to a south London police station, where he remains in custody.
