A woman was knocked unconscious in an attack outside Blacktown train station on Friday night.
Two women have been arrested for allegedly bashing the woman, 20, about 9.30pm on August 11.
Police allege the victim was walking along Main Street when the accused pair, 19 and 20, set upon her.
She was assaulted, and was knocked out in the process.
Blacktown police were called to the scene and set up a crime scene.
The victim was treated at the scene, and taken to Westmead Hospital in a stable condition.
Police arrested the two women, who were both charged with assault and affray.
The pair were granted conditional bail to front Blacktown Local Court on Wednesday.