WELD COUNTY, Colorado (CBS4)– An explosion occurred Thursday afternoon in Weld County at 27 Weld County Road and 72 Weld County Road after part of it hit a natural gas pipeline. The initial explosion kept first responders away from the scene for a while, as there was a risk of another explosion.

(Credit: CBS)

The driver was injured in the explosion and rushed to the hospital. It happened around 4:40 p.m. on Thursday.

Firefighters were allowed to come closer after a short time and sprayed the semi that was still burning.

(Credit: CBS)

The Colorado State Patrol said everyone within a 1 mile radius of the explosion was evacuated. What led to the crash and the subsequent explosion is being investigated.