Watch Sioux City Fire Rescue firefighters and paramedics work at the scene of a fire at 1819 West 1st Street on Thursday morning and deputy fire marshal Ryan Collins gives an early press briefing.
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Firefighters encountered heavy fire and smoke in the basement, and discovered three injured adults. All three victims were transported to Mercy Medical Center in critical condition.
Sioux City Fire Marshal Mark Aesoph said during an afternoon news conference that investigators were unable to recover any working smoke alarms from the home, which was registered as a rental with the city and last inspected in 2019.