A 55-year-old tenant, identified as Matt Lambert, has shot dead his condominium building manager, James Stuart, and wounded four other people in Washington, DC, before dying from a self-inflicted gunshot wound following a shooting incident linked by police to a dispute over building maintenance.

The incident occurred shortly before 8am on Thursday, November 12, 2026, at the Logan Circle neighbourhood, about a mile north of the White House, triggering a major police operation and the evacuation of nearby residents.

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According to Washington’s interim police chief, Jeffery Carroll, Lambert, an emergency medicine physician, had been involved in a prolonged disagreement with the condominium association over maintenance problems, including mould, moisture and water damage in his apartment.

Police said Lambert first opened fire inside a gym attached to the residential complex, killing Stuart, 46, who managed the building.

He subsequently returned to his seventh-floor apartment and opened fire from his balcony at people below, injuring four others.

One of the victims was reported to be in critical condition, while the remaining three sustained injuries that were not considered life-threatening.

After the shootings, Lambert barricaded himself inside his apartment and reportedly fired at police officers through the door as they responded to the emergency.

Carroll said the suspect also started a fire inside the apartment before shooting himself. Officers later entered the property and found him dead from the self-inflicted injury.

The police chief said the entire incident unfolded within approximately five minutes, although the emergency response continued for several hours.

Investigators believe the attack was connected to Lambert’s dispute with the condominium association, against which he had reportedly taken legal action over the condition of his apartment.

Court records indicated that he had complained about mould, moisture and water damage in the property.

Reports also indicated that Lambert had repeatedly complained about the problems on social media, with one account reportedly containing photographs and an engineering report documenting the condition of his apartment.

The shooting prompted dozens of police and emergency vehicles to converge on the neighbourhood, while helicopters monitored the area.

Nearby schools were placed under security restrictions, and residents were advised to remain indoors as officers dealt with the barricade situation.

Washington Mayor Muriel Bowser condemned the incident, describing it as a senseless act of gun violence.

The shooting also left the residential building uninhabitable because of fire damage, according to reports, with residents instructed to stay away while authorities assessed the property.

Following the incident, community and church groups gathered in Logan Circle for vigils and prayers in honour of the victims.

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Police have continued investigating the circumstances surrounding the attack, including the suspect’s dispute with building management and whether the four surviving victims were specifically targeted.