Fire crews responded to an explosion at a condo in Aurora on Feb. 8, 2014. (Photo: KDVR)

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AURORA, Colo. -- Fire crews responded to an explosion at a four-unit condo in Aurora late Saturday afternoon.

The explosion occurred in the 4500 block of S. Hannibal Street, tweeted the Aurora Fire Department.

Two males were displaced by the fire and were transported to a nearby hospital with burns, according to the tweet.

Crews worked an explosion at the 4500 S block of Hannibal in a 4 unit condo. 2 males displaced & transp w/ burns. Cause under investigation. — Aurora Fire Rescue (@AuroraFireDpt) February 9, 2014

The Aurora Police Department confirmed on Sunday that the explosion was caused by hash oil extraction.