She was treated on the scene by NSW Ambulance paramedics before being taken to hospital in a serious but stable condition.
A 15-year-old boy from Randwick was charged with reckless wounding, possess prohibited drug, and enter enclosed land not prescribed premises without lawful excuse; a 15-year-old boy from Punchbowl was charged with enter enclosed land not prescribed premises without lawful excuse; and a 14-year-old girl from Marrickville has been charged with common assault.
Another officer suffered minor injuries during the arrest of a man who allegedly attempted to set fire to a police vehicle parked outside Ashfield Police Station last Thursday night.
About 8.45pm, police arrested a man after he allegedly poured petrol over a fully marked police vehicle and attempted to set it alight, before throwing objects at another fully marked police vehicle.
Police had to use OC spray after the 28-year-old man allegedly became aggressive towards them, with a police officer suffering minor injuries.
The man was charged with damage property by fire (attempt), resist officer in execution of duty and malicious damage.
Teen trio arrest for officer attack
THREE teenagers have been charged after an off-duty policewoman was allegedly stabbed in Newtown early last Sunday morning, while another was injured carrying out his duties.
Police have been told the off-duty police sergeant stopped to assist a distressed teenage girl on Alice Street, Newtown, about 1am, when she was confronted by a group of teenagers and suffered a stab wound to her torso.