Makao Moore

Ten teens were injured and one killed in a shooting at a Washington Avenue office building early Sunday, authorities said, in what appeared to be a night of partying gone awry. Liquor bottles, cigar wrappers, gauze and bloodstains still littered the crime scene later that morning. Police had arrested one teen, a 17-year-old boy, in the area and turned him over to juvenile authorities. Shooting victims ranged in age from 15 to 19 years old, police said. A 12th person was injured at the party, but she was not shot — a 17-year-old girl was trampled as she ran down the stairs to get away. Makao Moore, a 17-year-old boy, was killed in the gunfire. Police are looking for other possible suspects and expect to release surveillance photographs on Monday. The incident started just after 1 a.m. Sunday morning, police said. Dozens of teens, both adults and juveniles, had gotten into the fifth floor of 1409 Washington Avenue, a loft building that had been converted into glass-walled suites, used in the workday as offices for tutoring centers and home health care providers and salons by hair stylists, makeup artists and massage therapists, among others. When the shooting broke out, police said, dozens of people surged out of the building onto an adjacent parking lot. Police entered the building and found the crime scene on the fifth floor. Officers recovered handguns, AR-style rifles and multiple types of shell casings. Officials said Sunday the party had been advertised on social media, and attendees had to message the organizers to get in. Police didn’t say how the teens gained access to the building. The building’s owner and management company did not immediately respond to a request for comment.