Early Saturday morning three people were injured in a house explosion turned structure fire that shook a neighborhood in Larimer County on the outskirts of Fort Collins.

Larimer County Sheriff's Office units and Poudre Fire Authority crews were called at around 2:45 a.m. to the 500 block of North Bryan Avenue, just west of intersection of Shields Street and Vine Drive. When crews arrived, two men and a woman were found outside the small apartment building with injuries sustained from the blast, authorities said in a news release.

Two of the people were treated and transported to Poudre Valley Hospital, the third went to Medical Center of the Rockies, a hospital spokesman said. Their identities were not immediately available pending family notifications.

Residents in the area, which is lined with smaller apartment buildings only separated by a few feet, went to shelters or with friends due to the immediate safety concerns. It was not immediately clear Saturday morning when they would be allowed to return.

Fire investigators and law enforcement remained on the scene well into Saturday morning and continued to piece together the explosions origin and cause.

The case remains under investigation.

Anyone with information regarding this incident is asked to call Larimer County Sheriff's Office at (970) 416-1985 or Crime Stoppers at (970) 221-6868 where you will remain anonymous and possibly be eligible for a cash reward.

The Coloradoan originally reported on this story.