A steel hangar under construction near the Boise, Idaho, airport collapsed on Wednesday night, resulting in three fatalities and nine injuries, as reported by fire department officials.

Of the nine injured individuals, five are currently in critical condition, according to officials. An eyewitness described the collapse of the hangar as resembling the falling of a “house of cards.”

“There was a catastrophic collapse of a metal structure at a construction site. First responders found a hectic scene and worked to secure and rescue victims,” Division Chief of Operations Aaron Hummel said in a statement.

The use of hoists was necessary to retrieve certain injured individuals, and, as mentioned by Hummel in a press conference on Wednesday night, some of the rescue operations posed significant challenges, ABC News reported.

According to Hummel, everyone present at the site has been confirmed to be accounted for. The collapsed structure was identified as the 39,000 square-foot hangar belonging to Jackson Jet Center.

Written by B.C. Begley