A fourth man has been arrested over a series of fires connected to Prime Minister Sir Keir Starmer, the Metropolitan Police has said.
The 48-year-old was arrested on Monday at London's Stansted Airport after initially being stopped by officers under schedule 7 of the Terrorism Act, 2000.
He was later arrested on suspicion of conspiracy to commit arson with intent to endanger life.
The charges relate to three * incidents – a vehicle fire in Kentish Town, north London, a fire at the prime minister's private home on the same street and a fire at an address that he previously lived in Islington, north London.
The man has been taken to a London police station and remains in custody.
Three * men have already been charged in connection with the fires, Ukrainians Petro Pochynok, 34, and Roman Lavrynovych, 21, and Ukrainian-born Romanian national Stanislav Carpiuc, 26, who are all due to appear at the Old Bailey on Friday.
Lavrynovych, of Sydenham, is charged with three * counts of arson with intent to endanger life.
Carpiuc, of Romford, and Pochynok, of north London, was charged with conspiracy to commit arson with intent to endanger life.
