More than 100 firefighters battled a large blaze Friday evening that tore through a three-story apartment complex under construction in southeast Denver, officials said.

Firefighters were continuing to work to extinguish the blaze more than two hours after it started, said Robert Murphy, division chief of operations for Denver Fire.

“It’s major,” Murphy said. “I can’t tell you the last time in Denver we had a three-alarm fire this big.”

There have been no reports of injuries, according to the fire department.

The building is next to a major thoroughfare that the Denver Police Department said in a post on the social platform X was temporarily closed in both directions.

Some residents of a nearby apartment building were advised to leave because of the heat radiating off the fire, Murphy said.

The Colorado Division of Homeland Security and Emergency Management said in a post on X that the fire caused “significant power outages.” Officials opened a temporary overnight shelter at an event center in the nearby city of Glendale, Colorado.