Three teenagers have been arrested after stones and pieces of wood were thrown from a bridge on to vehicles in Essex.
Youths had been seen throwing missiles from Love Lane footbridge, which spans the A13 at Aveley, near Grays, at 19:40 BST on Monday.
Essex Police said the force helicopter was deployed and three males, aged 15, 16, and 18, were arrested.
They are being questioned on suspicion of causing danger to road users.
All three were kept in police custody overnight.
Police said a number of vehicles had been damaged but full details were not yet known. No one was injured.
