An investigation into a fire that killed a Coos Bay couple Monday morning has determined the cause of that fire.
According to Coos Bay Fire Department, combustibles placed too close to a heater caused the blaze.
Fire crews say flames broke out early Monday morning near S. 19th and Idaho and the couple was found dead inside.
While the fire was contained to mostly one room, the entire building was exposed to thick black smoke.
"One of the things we look for during our investigation is to see if there were any working smoke alarms, and they had no smoke alarms,” said Coos Bay Fire Battalion Chief Dan Crutchfield. “It's not that there was one there that may or may not have worked; there were zero smoke alarms installed in that home."