Essex A12 rock damage to car 'not an attack'
An incident in which a car's sunroof was smashed by a rock or stone on the A12 in Essex is not being linked to two deliberate attacks, police have said.
No-one was hurt when the Citroen Saxo was hit near the A1124 Halstead Road bridge over the A12 at Eight Ash Green, Colchester, on Tuesday evening.
Police said they had examined the bridge and believed debris had fallen from a lorry.
Two cars were struck by large blocks of concrete on the A12 on 1 December.
A 57-year-old woman suffered serious injuries when the car she was a passenger in was struck by a bucket-sized block of concrete as it passed under the West Hanningfield Bridge, near Galleywood at about 22:00 GMT.
Forty minutes earlier and eight miles away in Ingatestone, mother and daughter Stella and Lisa Horne were left shaken when their Vauxhall Astra was struck by a large rock.
It dropped from Fyerning Lane Bridge on to the A12.
Police are treating both incidents as attempted murder.
A reward of up to £3,000 has been offered to find those responsible for dropping concrete blocks on to cars in Essex.