GRAND JUNCTION, Colo. (AP) – Grand Junction police are investigating the second suspected hash oil explosion this month.

The Daily Sentinel reported Friday that after a neighbor noticed PVC pipe burning in a yard this week and found no one home, emergency personnel were called. They found smoke, a small fire and evidence a butane explosion had damaged walls. A man who lives at the home was later found injured at a hospital.

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Earlier this month, police had reported an explosion linked to hash oil at a Grand Junction motel.

Hash oil is made by using butane to extract the psychoactive chemical THC from marijuana, producing a potent concentrate. Colorado and other states around the country have seen a rash of explosions linked to hash oil production in homes.

READ MORE: Drug Lab Inside Denver Homeless Camp Causes Explosion, City Finds 30 Propane Tanks

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