LONE TREE, Colo. (KKTV) - One person is dead following a crash south of Denver.

The crash was reported right at the start of the morning commute Tuesday on northbound I-25 at RidgeGate Parkway. At one point, traffic was backed up all the way from Lone Tree to Castle Rock. CDOT was reporting two northbound lanes still blocked as of 7:30 a.m.

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What led up to the deadly crash is still under investigation.

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