PHOENIX - According to the Arizona Department of Transportation, a man was struck and killed by a semi on Loop 101 Wednesday night.

The 24-year-old pedestrian was taken to a hospital in critical condition by Phoenix fire officials. The Arizona Department of Public Safety later said he was dead.

Northbound lanes are closed from Interstate 10 to Indian School Road as of 10 p.m., and they're expected to remain closed into the night.

Northbound on-ramps from McDowell and Thomas roads were also closed.