ROCKVALLEY, IOWA - UPDATE: The Sioux County Sheriff's Office has released the name of the victim.
84-year-old Luis Leuvanos died in the fire.
Fire crews responded to the call at 2:24 AM. When they arrived they found a portion of the home completely engulfed in flames and were told someone was still inside.
Firefighters gained entry to the residence, extinguished the fire and
discovered found the victim's body,
A fire has claimed the life of a person in northwestern Iowa.
According Rock Valley Fire Chief Brent Eshuis, one person was killed in a house fire.
Eshuis could not release any other details at this time.
The Iowa Fire Marshal is investigating the cause of the fire.