OTAY MESA, San Diego — Detectives worked Thursday to track down a man who pulled a gun and opened fire inside an Otay Mesa fast-food restaurant following a dispute with staffers, killing one employee and wounding two others.

The unidentified assailant shot up the Church's Chicken outlet in the 3700 block of Del Sol Boulevard about 5:30 p.m. Wednesday, according to San Diego police.

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The shooter then ran out of the business, got into a dark-blue sedan and sped off to the north on Picador Boulevard, Lt. Martha Sainz said.

Medics took the victims to trauma centers, where one of them, identified by family members as 28-year-old Maribel Ibanez of San Diego, was pronounced dead.

The other two wounded workers were hospitalized in stable condition, Sainz said. One of those victims has since been released and the other victim remains in the hospital in stable condition. Authorities have not released the men's names.

Witnesses described the gunman as a thin, roughly 6-foot black man in his 30s, wearing a light-blue sweatshirt and a blue Chargers-logo knit cap -

A GoFundMe.com page set up to help Ibanez's family with funeral expenses memorialized her as "a loving daughter, sister and aunt" who had recently married.