On April 11th, at approximately 6:50 PM, a bicyclist was riding northbound in the outside lane in the 2200 Block of 1st Avenue. A vehicle described by witnesses as a mini van was also traveling northbound in the same block and either collided with the bicyclist or was involved in a situation that caused the cyclist to crash. The driver of the vehicle then sped from the scene northbound on 1st Avenue. The male cyclist, who was not wearing a helmet, sustained a serious head injury and was transported to Harborview Medical Center by Seattle Fire Medics. Detectives from the Traffic Collision Investigation Squad (TCIS) responded and began their investigation. TCIS detectives will be responsible for the follow up investigation. Anyone with information on this collision is asked to contact Seattle Police.