A motorcyclist was pronounced dead Friday after being struck by a semi truck on State Route 905 in San Diego.

The collision occurred at around 5:30 at the eastbound 905 off ramp on southbound La Media Road. The semi driver, who was exiting the ramp, made an unsafe move to the right and collided with a stopped motorcyclist in the bicycle lane, running him over.

The motorcyclist was unresponsive at the scene, and was taken to the emergency room at Scripps Mercy Hospital, where he was pronounced dead less than an hour later. He has been identified as 72-year-old Enrique Ramirez Ramos.

The driver of the truck, who was not identified, does not appear to have been injured. He reportedly did not see Ramos while exiting the on ramp.

The collision remains under investigation. Drugs and alcohol are not believed to be factors.