Harris County sheriff's deputies said speed was likely to blame after a deadly motorcycle crash Tuesday night.

Investigators said the motorcyclist was speeding on Market Street near Bayou Drive around 11 p.m.

According to deputies, he tried to make a turn on Cedar Road and lost control. The motorcycle slammed into a guard rail, and the rider smashed his head on a concrete barrier.

Investigators said the man wasn't wearing a helmet at the time of the crash.

The motorcyclist died at the scene.