A 25-year-old man has been arrested in Newport, Wales, in connection with the Parsons Green terror attack, Scotland Yard have said.
Police are searching a property in Newport following the arrest on Tuesday evening.
Commander Dean Haydon, head of the Met Counter Terrorism Command, said: “This continues to be a fast-moving investigation. A significant amount of activity has taken place since the attack on Friday.
“We now have three men in custody and searches are continuing at four addresses. Detectives are carrying out extensive inquiries to determine the full facts behind the attack.