Man arrested at court while attending hearing of Jewish ambulance arson suspects

Met police say 19-year-old was detained in connection with attack after officers recognised him at arraignment

A fourth person has been arrested in connection with the arson attack on Jewish volunteer ambulances in north-west London, the Metropolitan police has said.

The force said the 19-year-old man was arrested on Saturday morning at Westminster magistrates court, where three other men were charged over the arson attack.