Sydney man bashed by gatecrashers: police

A man has been bashed in the head by a group of men armed with baseball bats who gatecrashed a party in Sydney's west.

Police say the men turned up at the Lethbridge Park home early on Sunday morning and assaulted a 23-year-old man at the party.

He was taken to Westmead Hospital with a fractured eye socket and head wounds.

Detectives have urged anyone who witnessed the assault to contact police.