Authorities say a 58-year-old man has died in a mobile home fire in southwestern South Dakota.

The Custer County Sheriff’s Office says Richard Roberts was found dead in his home west of Custer after the fire was called in late Monday night. Sheriff’s officials were on the scene within five minutes, but the mobile home was engulfed in flames when they arrived. Fire departments from Custer, Pringle and Argyle responded and were able to extinguish the fire before it spread to nearby homes. The cause of the fire remains under investigation.