A 16-year-old girl is in critical condition after being shot in the head on Friday by a stray bullet in Brooklyn.

Police said the girl was shot while inside a busy park at around 3 p.m. outside the Gowanus Houses in Boerum Hill as schools were being let out.

Police said she was not the intended target.

Officials said they are looking for three males — one fled on a Citi Bike, another on a scooter and the third on foot.

Since Monday, seven teenagers in the city have been shot — five fatally — and three others stabbed.