A gunman opened fire inside a gym in Washington, D.C.'s Logan Circle neighborhood on Thursday morning, killing one person and wounding four others, one of whom remains in critical condition. Police said the suspect then barricaded himself in a nearby apartment, where officers later found him with a self-inflicted gunshot wound. He is now dead.

Interim Metropolitan Police Chief Jeffery Carroll told a news conference that the suspect was believed to be contained at the location, while cautioning that the scene remained fluid. Officers arrived within 30 seconds of the first call, which came in just before 8 a.m., Carroll said. Police negotiators spoke with the suspect for more than an hour before officers heard a gunshot inside the seventh-floor apartment and forced their way in.S2

Carroll described the suspect as a white male and said investigators believe the shooting stemmed from a dispute between him and the residential building's homeowners association. The report is developing, and further details are expected as the investigation continues.S2