About 2:30am Sunday, someone set fire to a car parked in the driveway of a home on Shoreline Road, Moorebank, in Sydney's south-west. Police say that shortly after the car went up, several shots were fired into the house.

Inside that house were a 32-year-old woman and seven children, the youngest three, the oldest 10. And by the time police got there, the men responsible were already gone.