FOUR teenagers have been charged after items including a motorbike frame and tyres were thrown from a flyover and onto the M90 motorway near Kelty. 

Two 14-year-old boys and two 15-year-old boys were involved in several incidents between August 21 and August 29, including one which resulted in a crash.

In another incident on August 21 a motorbike frame and other items were thrown on to a lorry, while two days later tyres were thrown from the flyover and caused damage to a vehicle.

On August 28 unknown objects damaged a car windscreen.

Police say an 11-year-old boy was also involved but was too young to be charged.