A 55-year-old doctor shot and killed the manager of his apartment building inside a busy Washington, D.C., gym Thursday morning before wounding four others from his balcony and dying by suicide as police closed in.

The attack unfolded shortly after 8 a.m. at Vida Fitness in the Logan Circle neighborhood, about a mile north of the White House. Police identified the gunman as Matt Wade Lambert, an emergency room doctor who lived in a seventh-floor unit of the Metropole condominium building that houses the gym.

Lambert fatally shot building manager James Stuart, 46, inside the gym using a handgun, according to Metropolitan Police Department Interim Chief Jeffery W. Carroll. Witnesses described chaos as roughly 50 people exercised when gunfire erupted. One gymgoer recalled hearing a loud bang before seeing a man on the floor with blood pooling around him.

Lambert then returned to his apartment and fired a rifle from the balcony, striking two men and two women below. One victim remained in critical condition while the other three suffered non-life-threatening injuries. Police said the suspect used three firearms in total, including a shotgun during the later stages of the incident.

Officers responded within 30 seconds and established a perimeter. Lambert barricaded himself inside his unit, fired through the door at police at least twice, and broke a gas line, according to Carroll. Negotiators spoke with him for over an hour as he complained about the homeowners association. Lambert ultimately died from a self-inflicted gunshot wound.

Police linked the rampage to Lambert's long-running conflict with building management over mold and water damage in his penthouse. Court records show he filed a lawsuit against the Metropole Condominium Association in March 2025. Carroll described the motive as tied to that dispute.

A shelter-in-place order for the area was lifted around 11:30 a.m. The gym remains closed until further notice. DC Mayor Muriel Bowser said the White House had been briefed on the incident.

The shooting occurred in a neighborhood that has seen heightened scrutiny over public safety in the nation's capital.