JETMORE, Kan. (AP) — The state fire marshal is investigating an explosion at a southwest Kansas home that left two men severely injured.

The blast happened just after 6 p.m. Sunday in rural Hodgeman County, south of Jetmore.

KWCH-TV reports  the two men are a father and son who were flown to a hospital in Wichita, about 140 miles away. Both were in critical condition Monday.

The cause is under investigation, but the Hodgeman County sheriff says a propane tank is suspected. The house was destroyed.

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JETMORE — Officials from the state fire marshal’s office are in rural Hodgeman County today investigating an explosion and fire at a home.

The Hodgeman County Sheriff’s Office reported that first responders were called to a home in the 21,000 block of Southwest C Road just before 5:30 p.m. on Sunday.

Two men had made their way to a neighbor’s home following an explosion and fire. The victims, suffering from severe burns, were transported to the hospital in Jetmore and then flown to a hospital in Wichita.

The names of the victims have not been released. The sheriff’s office says additional details on the incident could be released Monday afternoon.