Riverside police responded to a shooting outside the Argosy Casino early Saturday morning.
Police say just after 5:00 a.m. a black man was shot in the valet circle, he was transported to an area hospital with life-threatening injuries.
Riverside, Platte County, North Kansas City, Gladstone and Kansas City officers set up a perimeter and used dogs and air to search for two black male suspects.
Shortly after 7:00 a.m. no suspects were located, and the perimeter was abandoned.
Police are working to see if any surveillance video and any witnesses can help in the investigation.
This story will be updated as more information becomes available.