Driver flees NSW central coast crash

A driver is on the run after a 16-year-old boy was pinned under a car following a crash on the NSW Central Coast.

The teenager, who was travelling in the front passenger seat, became trapped and has a serious arm injury after the vehicle crashed and flipped at Pearl Beach on Tuesday afternoon.

The injured boy was airlifted to hospital while the three other male occupants exited the car and the driver fled the scene, police say.