Six people were hurt, two with life-threatening injuries, in an incident at Gaylord Rockies Resort on Saturday morning.

Aurora Fire Rescue responded about 9:50 a.m. to the resort, 6700 N. Gaylord Rockies Blvd., where mechanical equipment — part of the HVAC system — collapsed into an indoor swimming pool area, according to a fire department news release.

At the time of the collapse, 50 to 100 people were inside the aquatics center.

Before the incident, eight firefighters from nearby Aurora Fire Station No. 16 were training in stairwells at the Gaylord property, the fire department said, allowing paramedics and EMT’s to respond quickly to the pool. Additional firefighters responded, including ladder trucks, engines and the department’s Technical Rescue Team.

“There were still hazards present with the threat of ongoing falling debris and mechanical systems” when emergency responders were first on scene, the news release said.

The resort and convention center, which has more than 1,000 rooms, features a water park on the sprawling property.

A spokesperson with the resort, owned by Marriott International, directed questions about the incident to Aurora Fire Rescue.

Ryan S. Luby, a spokesman for the city of Aurora, said in a written statement: “Our hearts go out to all those who were injured today, to their families and to those traumatized by witnessing what occurred. We expect a thorough investigation, and our immediate focus is the well-being of those involved, and we thank our first responders for their quick response and care.”