CLEVELAND (WJW) — The Cleveland Museum of Natural History in Wade Oval is closed Wednesday due to a fire in a mechanical room, according to the Cleveland Fire Department.

Firefighters said the call came in just before 6 a.m. and that the “small fire” involved insulation and a piece of “old” air-handling equipment.

The sprinkler activation system contained the fire, according to the fire department.

“Museum security on a routine security check found a small fire had started in an old air handler that was in the process of being replaced,” museum officials said in a statement. “No one was hurt and all animals are safe. There is no damage to the new spaces or the collections. Museum staff are assessing the damage which appears to be minimal. The museum will be closed today (Wednesday) and only essential staff are reporting,” museum officials added.