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Cleveland police say a man was shot in the hand Wednesday morning at Horseshoe Casino Cleveland. (Plain Dealer file)

CLEVELAND, Ohio -- A man shot in the hand Wednesday morning at Horseshoe Casino Cleveland had arrived at the casino with the shooter, according to a statement from Caesars Entertainment spokeswoman Shannon Mortland.

The relationship between the shooter and the victim is unclear. Both men argued before the shooting, Mortland said. 

Police said the victim was shot about 5:45 a.m. during a robbery. Spokesman Sgt. Ali Pillow did not immediately have more details about the incident.

The victim was taken by ambulance to MetroHealth Medical Center.

No arrests have been made. The shooter may have fled in a vehicle, Pillow said.

The casino is cooperating with police, Mortland said.