Grapevine police say an overnight crash has left one man dead.
The single-car crash was reported at about 2:45 a.m. Tuesday at the interchange between Texas 121 and Farm-to-Market Road 2499. When first responders arrived, they noticed the front end of the car was crushed and ran up to the driver's side window to check for a response, police said.
The officer then broke the driver-side window and discovered a man was pinned in place and unresponsive.
The 25-year-old Frisco man was pronounced dead at the scene.
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The exit from westbound I-635 to northbound SH-121 was closed while police investigated the crash.
No other injuries or drivers were involved.
Police said they believe the driver continued straight as the road curved, and the driver crashed head-on into a road sign and pillar.
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The exact cause of the accident remains under investigation and the driver's name will be released by the Texas Medical Examiners Office once family members have been notified.