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BOULDER COUNTY, Colo. — Seven people were injured in a fire at an oil site in a rural area near the Boulder-Weld county line Monday night.

According to Mountain View Fire Rescue, the fire occurred about 8:30 p.m. near East County Line Road and County Road 20 1/2.

The fire started in an area of a drill platform.

The seven injured people were taken to the hospital. They suffered moderate injuries, according to the fire department.

Authorities have not yet said what may have caused the fire or who owns the oil site.

Several agencies will be at the site of the fire on Tuesday to continue the investigation.