A 14-year old girl suffered facial lacerations when large rocks were thrown through the window of a parked car in Farmingville just after midnight Wednesday, police said.

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The rocks, heaved by boys that the teenager knew, also broke the bone around her eye, said a spokeswoman for the Suffolk police, which has launched an investigation.

The girl, who was treated at Stony Brook University Hospital, had been sitting in a 2005 Chrysler Pacifica with other teenagers.