Firefighters responded to the American Museum of Natural History early Tuesday morning after the museum’s fire alarm system alerted the FDNY of smoke in the building.

Approximately 60 FDNY members rushed to the scene to find heavy smoke conditions in one room on the first floor, according to fire officials.

A fire started in an office area of the museum near the Hall of North American Mammals on the first floor, the museum said in a statement. The hall will stay closed today while the museum assesses the damage, the statement continued, but the rest of the exhibits will remain open for normal operating hours from 10 a.m. to 5:30 p.m.

The FDNY said the situation was placed under control within an hour after responding.

One firefighter sustained minor injuries while responding to the incident.

The incident remains under investigation.