Gloucestershire Police has launched an investigation to track down an individual who threw a large stone from a bridge on to traffic on the M5.
The incident, which occurred in the early hours of Sunday between junction 12 and 11a of the motorway in Gloucestershire, prompted the police to send out a "strong message" to the person responsible for the offence.
The windscreen of a car travelling northbound on the M5 was cracked after a large stone was throne at it from the Upton Lane bridge.
The driver reported seeing a man on the bridge before the stone hit the car.
No-one was hurt in the incident, according to a police spokeswoman.
On December 1, a 57-year-old woman suffered fractures to her face and ribs, as well as internal injuries, after the car she was travelling in with her husband was hit by a bucket-sized concrete block, thrown from a bridge over the A12 in Essex.
Describing the incident, the victim's husband Steve Manley had warned that there could be copycat attacks.
Just 40 minutes before Mr Manley's car was hit, the windscreen of a vehicle driven by a 26-year-old mother-of-two was smashed by a large rock dropped from a bridge on the same road. She was not injured in the incident.
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