CENTRAL ISLIP, N.Y. (AP) _ A teen-ager gave birth in secret and hid her newborn son in her bedroom for 2 1/2 weeks while she continued going to high school, leaving the boy alone during the day, police said.

The teen's mother, Stephanie Clark, found the 4-pound infant in her daughter's bedroom Tuesday and called police, said Suffolk County Detective Sgt. John Twiname. Shanta Clark, 17, had not told anyone of her pregnancy or the birth Sept. 21, he said.

She had been feeding him, but left him alone while she went to school from 7 a.m. to 3 p.m. every day, Twiname said.

The newborn was in guarded condition at the University Medical Center at Stony Brook. The hospital did not immediately release any detail on the baby's condition.

The teen was charged with endangering the welfare of a minor, a misdemeanor. She was released on bail pending arraignment next month.