The Reno Police department is investigating a vehicle vs pedestrian accident that took place Saturday morning at Sierra and 7th Street. The pedestrian sustained substantial head trauma and a broken leg. His injuries are considered life threatening at this time. Investigators say the pedestrian was crossing Sierra St. outside of a crosswalk when he was struck by the vehicle. It appears that the pedestrian was under the influence of alcohol, and it does not appear that the driver of the vehicle was impaired.