HOUSTON – Witnesses tell police two motorcyclists were speeding in north Houston when one of them crashed into another vehicle.

The crash happened on Parker near I-45 late Sunday.

Police say they aren’t sure if the bikers were racing or just speeding, but one of them collided with a Scion. The rider died at the scene.

Witnesses say the other biker stopped to check on the injured rider, but he didn’t stay long before speeding away.

Parker was closed in both directions for several hours.

Photos: Deadly motorcycle crash on Parker Rd.