Three children have been arrested on suspicion of throwing stones onto a motorway from a bridge.
Witnesses said the children threw stones at cars on the M3
The 12 and 13-year-olds were found by Surrey's police helicopter after they ran away and hid in bushes when they realised they were being looked for.
Police received reports the children were throwing large stones from the bridge over the M3 near Lightwater Country Park on Monday.
They were arrested and released on police bail pending further inquiries.
'Ended in tragedy'
Witnesses told police the children were targeting lorries and cars passing under the bridge and also aiming stones at a motorist whose car had broken down on the hard shoulder.
In March 2003 lorry driver Michael Little was killed when a brick was thrown through his windscreen from a bridge over the same motorway.
Craig Harman, 20, of Glamis Close, Frimley, Surrey, was last month jailed for six years for his manslaughter.
Det Insp Helen Collins said: "We cannot stress too strongly just how dangerous it is to throw objects from motorway bridges.
"It can, and has, ended in tragedy and I would appeal to parents to impress upon their children the consequences of doing this.
"Anyone caught throwing objects onto the motorway will be punished."