A Colorado State Patrol trooper suffered critical injuries and another was seriously injured when they were hit by a pickup truck on Interstate 76 northwest of Denver.
Both were in the median helping a motorist reload one of two plastic farm chemical tanks that had fallen off of a flatbed trailer when a pickup truck drifted off the eastbound lanes into the median.
The accident closed the interstate for several hours.
Patrol spokesman Master Trooper Ron Watkins says one trooper was airlifted to Denver Health Medical Center, while the other was transported via ambulance. Names were not released.
The driver of the flatbed, which was being hauled by a pickup truck, was not injured.
Other details were not immediately available.