A student at tony Upper East Side prep school Dalton has died after jumping from a window on the building's 11th floor. Reports indicate that a group of students witnessed the as-yet-unidentified boy's death.

From the New York Daily News:

Detectives believe the student snuck into an empty dance studio on the school's 11th floor, opened the top part of the window and jumped, police sources said.

The school is in session this week and the body narrowly missed landing on several children who were playing on the sidewalk when the teen fell at 11:15 a.m., witnesses said.

"I heard a loud bang," said Dalton security guard Michael Brown, who was on the street when the body fell. "It sounded like a gunshot...he was just dead."

Awful story is developing...