A WOMAN has been arrested after a teenager was stabbed at a house on Sydney’s Northern Beaches.
The 18-year-old was knifed in the arm at a unit on Harbord Road at Dee Why around 8.30am on Saturday.
He was treated at the scene by paramedics before being taken to Manly Hospital.
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Police were called and arrested a 30-year-old woman at the scene.
She was taken to Manly Police Station where she is currently assisting with their investigation.
Police confirmed the man and woman are known to each other.