Investigation underway after encampment fire closed portions of I-25, I-270, I-76 northeast of Denver

An encampment fire caused multiple closures of I-25, I-270 and I-76 north of Denver in Adams County during the Tuesday evening commute. According to Adams County Sheriff's Office, the fires was likely started at an encampment and fueled by propane tanks underneath I-25. 

The closures started just before 5 p.m. Tuesday when the fire ignited underneath I-25 in the area of I-270 and I-76. There were multiple closures in the area, including the I-76 eastbound ramp to I-25 northbound, US 36 ramp to I-25 northbound, I-270 westbound at I-25, northbound I-25 at I-270 and southbound I-25 at I-270.

Adams County Fire Rescue investigated the fire in a multi-agency response that last several hours. The sheriff's office told CBS News Colorado the fire likely began at an encampment under and around the interstates and overpasses. There were also propane tanks in the encampment that fueled the flames. 

All lanes remained closed to traffic during the firefight and investigation until after 7 p.m. Tuesday. The lanes had reopened in time for the Wednesday morning commute. 

There were no reports of injuries.