Police make an arrest in London. Officers catch a 27 year old man. He has two passports. One passport is from Britain. One passport is from Iran. Police think he plans a crime.
The event happens at an air base. The name is RAF Fairford. US planes use this base. Police question another man. Officers also search houses in London.
Police make more arrests on Sunday. Officers hold 5 men. They carry strange items. The items are not bombs. The men are free again now.
Andy Burnham talks about a clue. He thinks Iran helps the man. Iran says no. Police work on the case.