Jeffrey Matthew Jackson, 17

Jeffrey Jackson, a 17-year-old black man, died Tuesday, March 30, a day after he was shot in the 800 block of Pacific Avenue in Long Beach, according to Los Angeles County coroner's records.

In a Long Beach Police Department press release, authorities said officers responded to a call of a shooting Monday about 10 p.m. When they arrived, they found Jackson with a gunshot wound to the upper body. He was taken to a hospital where he was listed in critical condition.

A 20-year-old Long Beach resident also was shot and taken to the hospital for treatment. His injuries were considered non-life threatening. A third person, an 18-year-old Long Beach resident, was not struck by the gunfire.

The next day, Jackson succumbed to his injuries and died at 5:44 p.m., according to coroner's records.

Detectives do not have a motive for the shooting, though they believe it's gang-related.

Anyone with information about the incident is asked to call Homicide Dets. Malcolm Evans or Daniel Mendoza at (562) 570-7244.

--Sarah Ardalani