A 13-year-old boy Thursday became the seventh New York City child to die this summer from gunshot wounds just days before historic U.N. summit talks on the plight of children around the world.

Leviticus "Levy" Mitchell, 13, was with two brothers, ages 17 and 19, at their home in the Morrisania section of the Bronx at 2:45 a.m. when he was shot in the chest, police said.The boy, who was visiting but not related to the brothers, was taken to Bronx-Lebanon Hospital where he died.

He was the sixth New York City child to be struck by gunfire since Friday and the 21st since July 22. Seven of those children, including a 3-week-old boy, have died.

Police said prosecutors from the Bronx district attorney's office were questioning the older brother, Warren Moore.

"The inclination at this point is that it was an accidental shooting," Vreeland said.

This weekend close to 80 heads of state from around the world will gather at the United Nations for the World Summit on Children, to discuss why 40,000 children die each day and millions more suffer from the scourges of poverty and illiteracy.

Summit organizers have said their aim is to have leaders commit themselves to improving nutrition, education and health care for children in their country.

The latest victim of gunfire was wearing a T-shirt and pajama bottoms when he was shot. He was taken outside on the street by the Moore brothers who flagged down patrol car.