Houston TranStar reported the incident at about 7:35 a.m. along I-10 Katy Westbound at I-45 North.
All westbound lanes of the Katy Freeway at Hogan Street were closed as a result, but they have since reopened as of 9:45 a.m.
According to the Houston Police Department, witnesses said a man jumped from an overpass and landed on a vehicle on the freeway. Police said the victim died.
Police are still trying to determine what happened.
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