A late-night fire at a multi-family house in Rapid City has killed a woman and her three grandchildren.
The Rapid City Fire Department says the fire that broke out shortly before 11 p.m. Tuesday killed 51-year-old Marcia Rock, 9-year-old Thomas Rosado, 5-year-old Dustin Rosado and 3-year-old Marquez Hawkwing.
Rock was pronounced dead at the scene, and the three children were pronounced dead at a local hospital.
Authorities say early indications indicate human actions may have contributed to the cause of the fire. Lt. Brent Long says the investigation continues and will be a slow-moving process to make sure the cause is confirmed.
The American Red Cross helped 17 displaced people find a place to stay for the night. As many as 21 people may have been living in the home.