Six people have been killed and nine others injured after a fire engulfed a two-storey residential building in Brooklyn, New York, in the United States.

The fire broke out shortly before 1:40 a.m. on Thursday, November 5, 2026, at a residential property on 58th Street in the Sunset Park neighbourhood of Brooklyn.

According to the New York City Fire Department, the blaze spread rapidly through the building, with firefighters arriving to find the first and second floors engulfed in flames.

More than 200 emergency responders, including firefighters and emergency medical personnel, were deployed to tackle the fire, which escalated to a three-alarm incident.

Four people were found dead inside the building, while two others who were taken to hospital in critical condition later died.

Nine other people sustained injuries, including three firefighters and two police officers. The injured were treated for varying degrees of injuries, with reports indicating that those affected were expected to survive.

Firefighters also rescued four people trapped inside the building, including two residents who were reportedly unable to escape because of window bars.

The blaze caused extensive damage to the property and spread to a neighbouring building. Eight residents were displaced and provided with temporary accommodation in hotels.

New York City Mayor Zohran Mamdani described the incident as a devastating tragedy, expressing sympathy for the families of those who lost their lives and acknowledging the efforts of emergency personnel who responded to the scene.

Meanwhile, fire marshals have commenced investigations to establish the cause of the incident.

Authorities disclosed that lithium-ion batteries were found at the scene, alongside an electric scooter. However, investigators have not established whether the batteries contributed to the outbreak of the fire.

Officials are also examining other possible causes, including electrical faults.

The incident comes amid concerns over fires involving lithium-ion batteries in New York City, with fire officials reporting hundreds of such incidents in the city during 2026.

Authorities have yet to release the identities of the six people who died in the Brooklyn fire.