Police are investigating after a boy died and another boy was injured following a dog attack in Paterson, N.J. (Credit: Jim Smith/WCBS 880)

PATERSON, N.J. (CBSNewYork) — One 13-year-old boy was killed, and another was injured, following an attack by a dog Saturday in Paterson, N.J.

The Passaic County Prosecutor’s Office said the bull mastiff escaped from its property Saturday morning, and came into contact with the two 13-year-old boys a short time afterward.

The dog attacked the boys as they walked along Sherwood Avenue between Crosby and Chamberlain avenues, Paterson police said.