Youths throw object at coach from Surrey M3 footbridge
Two teenagers who threw an object, thought to be brick, at a coach on the M3 are being sought by Surrey Police.
Police said the coach was travelling westbound between junctions one and two, for Sunbury and Chertsey, when the incident happened on Saturday.
Det Con Ash Mullem said no-one was injured but, given the speed and volume of traffic on the M3, the incident could have had "tragic consequences".
Police said the coach was forced to pull over onto the hard shoulder.
Det Con Mullem said: "I cannot stress too strongly just how dangerous it is to throw objects from motorway bridges.
"It can, and has, ended in tragedy and we are committed to bringing more offenders to court to face justice and anyone caught throwing objects on to motorways will be dealt with robustly."
He said the object, thrown from a footbridge at about 1845 BST, cracked the coach windscreen and caused £1,000 damage.
Police said the coach was full but they were unsure of the exact number of passengers on board.
The offenders are both described as white, in their early teens, with one wearing a white top and the other wearing a blue top.
Officers have appealed for information and are viewing local CCTV footage.