Two men suffered stab wounds at the weekend during separate incidents at Barrack Heights and Albion Park.
About 3.15am Sunday, a 57-year-old man was awoken when a large rock was thrown at a window of his home on Carrington Street, Barrack Heights.
He went to investigate and found four males allegedly smashing the windows of his car.
When he approached the group, along with his 19-year-old daughter, the man was stabbed in the back and kicked numerous times before the offenders fled.
The injured man was taken to Wollongong Hospital where he was treated for stab wounds and a suspected punctured lung.
His daughter was not injured.
In a separate incident, about 10pm Sunday, a 37-year-old man discovered the rear door of his home on Roper Road, Albion Park, open.
When the man went outside to investigate he saw a balaclava-clad male running from the side of his home, police claim.
The man was assaulted and stabbed after chasing the offender a short distance.
He was taken to Shellharbour Hospital and treated for stab wounds to his face and arm.
Lake Illawarra police attended both incidents and set up crime scenes, which were examined by specialist forensic officers.
Anyone with information on either stabbing is urged to contact Lake Illawarra police or Crime Stoppers on 1800 333 000.