Witnesses are being sought after a random attack in a public car park in Ballybofey last week.
The incident occurred on Wednesday last in the main town car park at Lower Main Street.
A man was sitting in his car at approx 10pm when a stranger came up to his vehicle and started to repeatedly punch the windscreen of his car. The glass eventually shattered and the windscreen caved in on top of the driver.
The car owner then fled the car and was forced to leave his vehicle unattended.
Gardaí have released a description of the suspect: He was a man of around 6ft in height, of a stocky build and with grey hair.
Anyone with any information is being urged to contact Letterkenny Garda Station on 074 916 7100 or call the Garda Confidential Line on 1800 666 111.