World news: Man attacks Airforce officer with a knife

Norfolk police are searching for two men who threatened an airman with a knife outside RAF Marham in Norfolk on Wednesday afternoon.

The serviceman, who was not in uniform, was not injured. The two men fled the scene in a dark coloured Ford Galaxy.

The base was locked down as police closed nearby roads and conducted patrols in the area. Officers were working closely with personnel from RAF Marham. The Ministry of Defence said it was aware of the “ongoing police operation” at the base but declined to comment further.

Marham is home to four squadrons of Tornado bombers, which have beenconducting raids against Islamic State fighters in Syria since December from a base in Cyprus.

Lorne Green, police and crime commissioner for Norfolk, told the East Anglian Daily Times that the incident was under “close investigation with an open mind”.

“There is nothing at the moment to strongly suggest one motive above another and it is all subject to a very intensive investigation at the moment. There is a very close co-operation between the constabulary and the military police, which is ongoing at the moment.”