LITTLE ROCK, Ark. (AP) — Authorities say a man has been found dead on the side of Interstate 40 in North Little Rock.

Seventy-six-year-old Thomas Walker of Virginia was discovered Sunday afternoon near the 154 mile marker of the highway.

Arkansas State Police found Walker about 3 p.m. lying about 15 to 20 feet from his car with no obvious signs of trauma. Police say they aren't sure how long he had been lying there, but he was pronounced dead at the scene.

The Pulaski County coroner is investigating Walker's death as the result of natural causes.

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Information from: KATV-TV, http://www.katv.com/