Three people are assisting with inquiries after a man was injured during an attempted break-in at a house in Whalan.
About 2.30am this morning (Thursday January 16), Mount Druitt police were called to Bramble Avenue following reports of a group causing trouble at the home.
Police alleged the group attempted to gain access to the premises, and damaged the screen door, but did not enter the home.
A man, 18, told police he was assaulted and stabbed with a fence paling.
He was treated at the scene by paramedics and taken to Westmead Hospital ,where he remains in a stable condition.
A male and a female, both aged 17, and a man, 19, were arrested nearby and taken to Mount Druitt Police Station where they continue to assist police with their inquiries.
Investigations into the matter are ongoing.
Police are urge anyone with information about this incident to call Crime Stoppers on 1800 333 000