An emergency has been declared at a massive Department of Energy nuclear site in South Carolina after a fire broke out at a laboratory, officials said.

The fire ignited at the Savannah River National Laboratory at the Savannah River Site (SRS) near Aiken, South Carolina, around 5:39 p.m., officials said.

The incident triggered emergency response activities, but crews extinguished the fire roughly two hours after it was reported, according to SRS.