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Portland police are investigating a crash near George Middle School that left a 15-year-old boy with potentially life-threatening injuries on Tuesday, Aug. 30, 2016. (Oregonian/OregonLive)

(The Oregonian/OregonLive)

A 15-year-old boy was taken to a hospital with serious injuries after a car hit him Tuesday in North Portland, Portland police said.

Natanael Lopez-Castillo hit Bradley Fortner while Fortner was crossing a street near George Middle School shortly before 8 a.m., spokesman Sgt. Pete Simpson said in a news release. Simpson initially described Fortner's injuries as "potentially life-threatening."

Fortner is an incoming freshman at Roosevelt High School, Portland Public Schools spokeswoman Courtney Westling said. Tuesday is the first day of classes for the high school, which is a few blocks from the middle school.

Lopez-Castillo, 28, stopped about a block away and walked back to the scene of the crash, Simpson said. Lopez-Castillo hit Fortner while driving east on North Columbia Boulevard in a 1993 Nissan pickup truck. The teen was crossing the street from south to north at the time.

Fortner wasn't in a marked crosswalk, Simpson said. All intersections are legal crosswalks in Oregon. There is also a pedestrian bridge near the intersection.

Lopez-Castillo didn't show signs of being impaired, and police didn't cite or arrest him, Simpson said.

Police are continuing to investigate the crash. The Multnomah County District Attorney's Office will review the case once the investigation is complete, Simpson said.

Classes at the middle school weren't affected by the investigation, Simpson said. Lopez-Castillo and Fortner live in North Portland.

Columbia Boulevard was closed between Midway and Burr avenues. The crash happened on Columbia at Midway.

-- Samantha Matsumoto

smatsumoto@oregonian.com

@SMatsumoto55

Jim Ryan of The Oregonian/OregonLive staff contributed to this report