The last expansion of the base took place in the early 20th century when large barracks along Randall Avenue were constructed.

A neighbor found them in their apartment at 2120 Randall Avenue, a spokesman for the police, Officer Fred Weiner, said.

Witnesses said Mr. Mullins was chased by the gunman 100 yards from the field, across Randall Avenue and a wide grassy mall between buildings.

He was shot and collapsed in front of 1715 Randall Avenue, another building in the complex, the police said.

Daniel Velasquez, 13 years old, of 2120 Randall Avenue in the Bronx, was arrested near his home at about 7 P.M., the police said.

Residents said the boy lived at 2280 Randall Avenue, one of the buildings in the housing project.

Here, it connects to Randall Avenue (southbound) and Lafayette Avenue (northbound) as it makes its way northward.

The police said two males were seen running from the scene toward another building in the complex, at 2280 Randall Avenue.

He opened it when he was in a taxicab riding towards Randall Avenue with his luggage.

The only other interchange between there and the terminus is Randall Avenue.