DES MOINES, Iowa (KCCI) – One person escaped injury but another died during a house fire Sunday night, in Des Moines. According to KCCI, a woman who was trapped inside the burning home died in the fire on the east side of the Capital City. The fire was first reported just before 6 p.m. near the intersection of Wilson Avenue and Glenbrook Drive near Union Park.

Des Moines fire Lt. Rick Thomas said the woman was sleeping on the couch when flames tore through the house. Her adult son was outside when fire crews arrived at the scene. Crews quickly tried to battle through conditions to reach the woman, but a burned out floor slowed their progress. By the time firefighters found the woman, she had already died. Her name was not immediately released.

Officials say the son wasn’t injured, and a dog was safely taken out of the home. Investigators are looking into what caused the fire.