Coach windscreen shatters on M25 in Surrey
An incident that left a coach windscreen shattered on the M25 after it passed under a footbridge in Surrey is being investigated by detectives.
Surrey Police are working to establish whether road debris hit the windscreen or whether an object was thrown from the bridge in Merstham on Saturday.
The single-decker coach had 32 people on board when the windscreen smashed.
Passengers were left shaken but no-one was injured. Officers searched the area after the incident was reported.
Det Sgt Judith Burton said the coach had passed under the Malmstone Avenue footbridge on the anti-clockwise carriageway of the M25 just before the M23 slip road at about 15:40 BST, when the incident happened.
She said she wanted to speak to anyone who was travelling on that part of the London orbital motorway or who was using the footbridge at the time.
"We need to establish the full circumstances about how the damage was caused," she said.
"At this stage in the inquiry it is not known if road debris has hit the windscreen of the coach or if an object has fallen or been thrown from the footbridge at the location."
Because of the location of the incident, officers searched the area by foot and in cars to establish if a third party was involved, she added.
A helicopter was also used in the search.