A motorcyclist lost control of his bike and died in a crash early Sunday morning near downtown Houston, authorities say.

According to the Houston Police Department, a man was traveling westbound on Navigation around 12:55 a.m. when he went into a curve and lost control. He slid 150 yards off the roadway.

Police say he wasn't wearing a helmet and suffered head trauma. He was pronounced dead at the scene.

The investigation is ongoing.