Girl critical after Sydney apartment fall

A young girl is fighting for life after she and a young relative fell from an apartment window in Sydney's west.

The five-year-old girl fell from a window of the third-storey apartment on South Terrace in Bankstown, along with a three-year-old boy, just before 9am on Sunday.

The girl suffered life-threatening injuries and remained in a critical condition on Sunday night, a spokeswoman from the Westmead Children's Hospital said.

The boy received minor injuries and remains in a stable condition.

NSW Police say the two children were related but didn't specify whether they were brother and sister.