A woman has been slashed with a knife while trying to break up a fight between two teenage girls at a shopping centre on Sydney's northern beaches.
Police allege the woman was hurt after intervening in an "altercation" between the girls, aged 13 and 14, at a shop inside the Brookvale mall on Monday afternoon.
The 42-year-old was treated by paramedics for a knife injury to her arm before being taken to Royal North Shore Hospital, where she remains.
She later handed herself in to police and was charged with reckless wounding, affray and custody of knife in a public place.
The teen from Narraweena was granted bail to appear at a children's court on January 22.