Police say a woman whose car crashed into four pedestrians at Kellyville in Sydney’s north-west last night was drunk and texting on her mobile phone when the accident happened.

Just before 9.30pm emergency services were called to Hezlett Road after the car driven by the 50-year-old woman hit four members of one family.

A four-year-old girl is in a critical condition after sustaining head and internal injuries. She was taken to the Children’s Hospital at Westmead.

Her aunt, 55, suffered internal and spinal injuries in the crash and is in a critical condition at the Royal Prince Alfred Hospital.

The girl’s mother, 44, is in a serious condition at Westmead Hospital with facial injuries and arm and pelvic fractures, and the girl’s father was also taken to Westmead with non-life-threatening head injuries.

The driver of the car has been charged with three counts of dangerous driving, one of negligent driving, mid-range drink driving and using a mobile phone while driving.

She has been granted conditional bail and will appear in Parramatta Local Court on October 10.

Police have urged witnesses or anyone with dashcam footage to come forward.

-ABC