A woman has been charged with stabbing another woman after a fight broke out between the two in Northbridge early this morning.
A police spokesman said the 23-year-old Swan View woman was walking in James Street, Northbridge at 3am with two male friends when she was approached by a woman and an argument developed and escalated to a physical confrontation.
Police allege the second woman produced a folding knife and slashed at the victim, causing "a penetrating wound to her left forearm".
"Police on patrol arrived on the scene just after this and saw the woman attempting to further strike the victim," the spokesman said.
She was arrested and the victim was treated at Royal Perth Hospital for her wound.
A 20-year-old Seville Grove woman has been charged with unlawful wounding and will appear in Perth Magistrates Court on January 22.