The Denver Fire Department is investigating a fire that caused an explosion inside a building in Denver Wednesday morning.

A fire and explosion were reported at a Denver-area assisted home facility on Wednesday morning. According to a social media post from the Denver Fire Department, crews responded to the fire around 11:30 a.m. local time. About a half hour later, the fire department said an explosion had been reported inside the same facility.

Officials in Denver say 10 people were taken to hospitals and dozens were displaced after an explosion and transformer fire at an assisted living facility.