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HOUSTON Authorities are trying to determine what caused a fatal accident Saturday night in north Houston.

According to the Harris County Sheriff s Office, it happened around 8:15 p.m. at Aldine Mail Route and Landfair.

Investigators said a pickup truck with one male driver was heading east on Aldine Mail Route and crossed over into the middle lane. The truck crashed nearly head-on with an SUV carrying a family of five.

No one in the SUV was injured, but the driver of the truck died at the scene, deputies said.

Deputies are looking into possibility that a medical situation caused the crash, because there were no signs of trauma on the man.

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