EL PASO COUNTY, Colo. (KRDO) -- Southbound I-25 near Mesa Ridge Parkway was backed up Friday while law enforcement worked on a massive crash scene.
Colorado State Patrol says around 8:20 p.m. a motorcyclist was hit by a semi-truck.
According to CSP, they're unsure if the driver of the semi-truck was even aware of the crash. Witnesses told troopers it was possibly a Walmart semi-truck.
The motorcyclist was taken to a nearby hospital with critical injuries. Troopers closed one lane of southbound I-25 at the Mesa Ridge Parkway exit in Fountain.
As of 9:45 p.m., CSP had not found the semi-truck.
Southbound I-25 is down to one lane as of 10 p.m.
This is a developing story.