DES MOINES, Iowa -- Two men say they rushed into a Des Moines home after seeing an explosion and brought a 600-pound man to safety.

Byker Mark and Steve Miller say they saw fire shooting out of a neighbor's home on Thursday afternoon.

Mark tells KCCI that he heard crying inside the home and broke through the front door. Mark says he saw a man weighing roughly 600 pounds collapse as soon as he got inside.

Mark and Miller say they rolled the man into a nearby ditch and put towels on him.

The victim's name and condition aren't yet available. Mark and Miller say he appeared to suffer severe burns to his hands, chest and feet.

Officials say the cause of the fire remains under investigation.