Boy seriously injured in four-storey fall

A 15-year-old boy has suffered head injuries and broken bones in his arms and face after falling from a window on the fourth floor of a west Sydney building.

The teenager was left unconscious following the fall from the unit complex in Cabramatta late on Monday night.

He was taken to Liverpool Hospital, where he is believed to be in a serious but stable condition.

Police believe the accident was one of misadventure, and there are no suspicious circumstances.