A bullet was fired into a Port Kembla home on Tuesday.
Lake Illawarra police found a bullet hole in a window of a home on Cowper Street at 8pm on Wednesday.
Police said the homeowner noticed a hole in the window on Tuesday but only found the bullet inside the home the next day and called police.
Police said the shot was allegedly fired between 8am and 7pm on Tuesday.
No one was in the home during the incident and no one was injured.
Police established a crime scene and are appealing for anyone with information.
Crime Stoppers: 1800 333 000.