LONDON, ON - Police in St. Thomas, Ont., say they suspect occupants of a lower apartment in a house were producing marijuana oil when an explosion tore through the residence Thursday night.

The blast was so powerful windows were blown out of the house and nearby vehicles parked on the street.
Although the occupants fled the scene, they were known to police and after checking hospitals officers found one of the suspects suffering from burns, police said. The others are still on the run, but cops in the southern Ontario city say they're in the process of obtaining arrest warrants for them.

An undisclosed quantity of marijuana was discovered in the apartment, police said.
Nobody who lives in the house's other apartments was injured.