A motorcyclist involved in an accident with a truck Monday afternoon near Aniani Street in Waipahu has died, police said.

After the motorcycle crashed, the driver of the truck did not offer assistance and fled, police said.

Both the 47-year-old motorcycle rider and the truck were traveling east on Farrington Highway, police said. The truck was in the left lane and the motorcyclist was in the right lane when the truck abruptly turned right to a Chevron gas station, cutting off the motorcycle, police said.

The motorcyclist lost control and crashed. He was not wearing a helmet, police said. He was taken to The Queen's Medical Center in critical condition and died Monday night.

Police last night said they recovered the truck, but not the driver, on Leonui Street in Waipahu. Police opened a negligent homicide investigation.