A 2-year-old boy died Wednesday, days after being found unconscious in a backyard swimming pool, police say.

The toddler was found floating unconscious in a pool Sunday on Sunset Beach Road in North Haven.

Southampton Town Police, Sag Harbor Village Police and Sag Harbor EMS responded to the scene and performed CPR on the child. He was transported by ambulance to Southampton Hospital and then to Stony Brook University Hospital, where he died.