NEWARK, N.J. — A 14-year-old shot and killed a police officer and wounded another Friday evening in New Jersey, authorities said, in a chaotic scene that witnesses described as seeing officers running down a busy street before they heard a volley of a dozen or more gunshots.

The slain officer, 26-year-old Joseph Azcona, was part of a team of Newark police detectives and federal agents that had gone to capture a suspect in an illegal weapons sting when the officer was fired on in his vehicle, authorities said.

The other officer who was struck was hospitalized with injuries that were not expected to be life-threatening, authorities said. Newark Mayor Ras Baraka called the shooting a “heinous, callous disregard for humanity” and that officers had gone to the scene knowing that “grave danger was possible.”

Police took five people into custody, including the 14-year-old who was charged with murder, attempted murder and possession of illegal weapons.

— The Associated Press