A 38-year-old man has been arrested in east London on suspicion of sharing terrorist material.
Scotland Yard counter terrorism officers swooped on an address in the capital on Thursday morning.
The suspect was held on suspicion of dissemination of terrorist publications, as well as publishing or distributing written material contrary to Section 19 of the Public Order Act 1986.
He was taken to a south London police station where he remains in custody.
The arrest was made under the Police and Criminal Evidence Act.
Searches of the address are ongoing.
