San Diego police shot and killed a man reported to have suddenly opened fire at a poolside birthday party at an upscale apartment complex Sunday, hitting seven adults. The suspect, later identified as Peter Selis, 49, was a resident at the La Jolla Crossroads complex, where police said he opened fire on the group with a semi-automatic pistol. Selis was white, and all the victims were people of color: four black women, two black men, and one Latino man. Authorities said no motive was known; local media reported Selis, a mechanic at a local Ford dealership, had filed for bankruptcy protection in 2015 and was beset by money problems. By late Sunday, at least one of the victims was dead, while others were in surgery or in critical condition, said Police Chief Shelley Zimmerman. One witness told reporters that the shooter appeared to be relaxed, even in the midst of the violence. “He had his beer in one hand and his gun in the other,” said the witness, who said he lived in the apartment complex. He was only identified by his first name, John. “There were two victims lying on the ground, one trying to crawl toward the other one to help,” he added. “This is truly a horrific act of violence that took place here today,” San Diego Mayor Kevin Faulconer told reporters at a press conference. “Our entire city, all of our thoughts and prayers, all San Diegans’ thoughts and prayers, are with the victims and their families tonight.”