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Police and pharmacists are warning producers of a marijuana extract called "shatter" after two explosions related to the manufacturing of the drug.

Shatter is an increasingly popular form of hardened, glasslike cannabis oil made by extracting psychoactive ingredients from the leaves and buds of marijuana plants.

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The extraction process often involves soaking the plants in alcohols like isopropyl or butane.

"Some of these chemicals are highly volatile. If you don't know what are you doing you could bring your whole house down," said Lori Postnikoff, a field officer for Saskatchewan's College of Pharmacists. The process of extracting cannabis resin has been linked to at least two explosions in Regina in recent years.

Three people were arrested and charged with production of cannabis resin after a Regina house exploded on Feb. 24. Two of them were hurt in the explosion.

In a separate case, a 21-year-old Regina man was charged with producing cannabis resin after an explosion at his mother's house in 2013.