CHILDREN have been spotted throwing stones at motorists from a bridge over the M25.
A woman reported damage to her windscreen around 4.50pm on Friday when something was dropped from the B1335 Stifford Road bridge near junction 30.
On Saturday three children were spotted on the bridge throwing what were believed to be stones onto the carriageway of the M25 at the same location.
A lorry driver later reported a stone hit his cabe windscreen causing minor damage.
Searches were immediately launched following both incidents, using both local officers and the police helicopter, but no one was found.
Officers are now urging parents to ensure it is not their children committing this dangerous act.
Chief Inspector Justin Smith: "This is very serious and it is fortunate that these incidents did not result in any injuries. These children may think it is just a game but it is so very stupid and dangerous.”
The children were described as two boys and a girl and she was wearing distinctive pink trousers.
They were thought to be two teenagers and a younger child.
Chief Inspector Smith added: "I would ask parents to please talk to your children and make sure it is not them that are responsible, because this is a crime and we will arrest anyone found committing these acts.”
Anyone with information is asked to contact police at Grays police station on 101.