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The Colorado State Patrol said a 24-year-old Denver man died Saturday morning in a rollover crash on U.S. 36 at Table Mesa Drive in Boulder.

Colorado State Patrol Trooper Josh Lewis said the State Patrol was called to the scene at 5:36 a.m. The single-vehicle crash involved a 2012 Jeep Wrangler. The man driving was declared dead at the scene.

The westbound lanes of U.S. 36 were closed for several hours while authorities investigated at the scene. Drivers were asked to exit at Foothills Parkway. Boulder police said they reopened westbound lanes on the highway just before 10 a.m.

Lewis said the cause of the crash continues to be investigated. Lewis said if anyone witnessed or has any further information on the crash, they can call the Colorado State Patrol’s dispatch line at 303-239-4501.