A 12-year-old girl drowned in her backyard pool in Long Island Monday night, Suffolk County police said.

Addison Delossantos was found unresponsive in her family’s pool on Association Road near Susan Drive in Bellport around 7:20 p.m. Monday, cops said.

She was rushed to Long Island Community Hospital in East Patchogue, where she was pronounced dead.

Her death remains under investigation.

The incident came just over a week after Abdul Brezault, 18, of Canada, drowned in the backyard pool of a Dix Hills home, where he was visiting for a family gathering.