LAS VEGAS (KLAS) — Nevada State Police are investigating a five-vehicle crash that occurred on U.S. 95 southbound near Boulder Highway Wednesday morning.

The crash which was reported at 4:40 a.m. caused major traffic delays for morning commuters when the freeway was reduced to one lane for more than two hours.

Two people with injuries were transported to a hospital. Nevada State Police Trooper Ashley Wellman said one woman was arrested for suspected impairment.

At one point, the backup extended to near the Spaghetti Bowl.