A man has been injured after a brawl broke out at a house in Emu Heights overnight.
Police say they were called to reports of a brawl outside a premises on Palomino Road at Emu Heights just after midnight.
On arriving, a group of people from a nearby party were involved in a fight.
During the brawl, an 20-year-old man has been hit in the back of head by another male.
The 20-year-old has fallen to the ground and initially assessed on site by Ambulance Paramedics before being taken to Nepean Hospital.
He continues to remain in a stable condition.
Police spoke to a number of people at the scene, however they are not co-operating with police at this time.
Police are urging anyone with information about this incident to call Crime Stoppers on 1800 333 000