A young woman has been found unconscious and badly injured in Telopea in Sydney's north-west overnight.
Emergency services were called to Eyles Street just after 10pm finding the woman, believed to be aged in her early 20s, next to a parked car suffering head and neck injuries.
She's now in Westmead Hospital in a serious condition with reports she may have been bashed with a brick.
Specialist forensic officers have been working through the night, taking away a number of items while the car has been seized for testing.
Police are now urging any witnesses to come forward.