A MAN remains in The Alfred hospital with serious burns after an explosion at Natimuk on Monday.
The man, 55, and another man in his 30s suffered burns when a kerosene heater exploded.
Police, paramedics and fire-fighters were called to Horsham Rural City Council's depot near the corner of Main Street and Schurmann Street at 3.49pm on Monday.
Ambulance Victoria spokeswoman Gabrielle Degenhardt said both men were airlifted to Melbourne's The Alfred hospital.
The older man had serious burns to his legs and a hand.
The Alfred spokeswoman Hannah Chipp said the older man was in a stable condition.
She said the other man, believed to be in his 30s, had minor burns to one hand.
"The younger man has been discharged already," she said.
WorkSafe is investigating the incident.
Country Fire Authority District 17 acting operations manager Trevor Ebbels said the men were trying to re-fuel the kerosene heater when it blew up.
"I have asked for a fire investigation report to be generated because of the nature of the injuries," he said.