A 21-year-old Longmont man was killed and three others were injured in a head-on two-car collision that occurred early this morning on U.S. 36 north of Boulder. It is not believed to be weather related, officials said.

The Colorado State Patrol is investigating the wreck that occurred at 2:30 a.m. near the intersection of U.S. 36 and Longhorn Road.

A 2003 Volkswagen Jetta being driven by 22-year-old Kevin Winnie was traveling westbound on U.S. 36 when it entered a curve at a high rate of speed and passed the centerline into the oncoming lane, according to a news release issued by the state patrol. The Jetta then struck an eastbound Audi RS5 sedan head-on and slid off the southern side of the road, rolling multiple times, the release says.

Two passengers of the Jetta, who were not wearing seatbelts, were ejected in the rollover, officials say. One of the Jetta passengers sustained fatal injuries and was declared dead at the scene. The other, also a 21-year-old man for Longmont, was transported to an area hospital with life threatening injuries. The names of both men are being withheld at this time.

Winnie, who also was not wearing a seatbelt at the time of the wreck, suffered "moderate" injuries. He was transported to a local hospital for treatment.

Jose Pacheco, 37, of Deming, N.M., was driving the Audi. He was wearing a seatbelt and suffered only minor injuries, according to the release.

The roadway was reportedly dry at the time of the accident and there was no inclement weather to speak of. Excessive speed and alcohol and/or drug consumption are considered contributing factors, officials say.

Charges are pending against Winnie.

Contact Camera Staff Writer Joe Rubino at 303-473-1328 or rubinoj@dailycamera.com.