Man dies after house party brawl in Ingleburn

A man has died after a brawl erupted at a party in Sydney's southwest.

The brawl is believed to have begun during the party at a home on Chester Road in Ingleburn last night.

It spilled into the street, with more people arriving in vehicles, some armed with baseball bats.

The crowd began to disperse after police arrived about 9.40pm.

A man was suffered serious injuries and despite the efforts of paramedics, he died at the scene.

Four men were arrested and are being questioned by police.

Chester Road will remain closed between Percy Street and Gertrude Avenue as police examine the scene.