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A teenager suffered a facial injury after a rock smashed the window of a car she was travelling in, police have said.

The 18-year-old required hospital treatment after the incident in Downpatrick, County Down.

Police said the rock was thrown at the car on Killough Road on Tuesday night just before 22:45 BST.

There has been a visible police presence in the area in recent days due to anti-social behaviour.

This has included helicopter surveillance over the Model Farm and Flying Horse estates.

Police, who believe the rock may have been thrown from a nearby alleyway, said that presence will continue.

"In light of recent incidents of anti-social behaviour, I am also appealing to those involved to keep a cool head and think about the consequences of your actions which could lead to a criminal record," PSNI Insp Heatley said.

"Officers will continue to provide a visible policing presence in the Downpatrick area and police would appeal to anyone who witnesses any anti-social behaviour to contact them."

Police have also appealed for mobile, or dash-cam footage that could help us with the ongoing investigation.