Police are investigating after shots were fired at a vehicle in west Sparks early Saturday. Police were called to the Oak Room Lounge on Oddie Blvd. about 2:30 am. Police arrived to find bullet casings in the parking lot but none of the people involved were there. Surveillance video shows several people firing at a vehicle, possibly a white sedan, as it drove out of the parking lot. The footage also showed other people in the area. Anyone with information is asked to call police or Secret Witness at 322-4900. Secret Witness is offering a $500 reward.