Investigators were trying to determine if two men arrested in the Cincinnati area were responsible for terrorizing employees at a Stringtown Road restaurant.
Police said workers at Golden Corral were bound with zip ties and robbed at gunpoint last week.
Union Township police, near Cincinnati, responded to a robbery alarm at a Golden Corral on Saturday night. Officers found those employees had also been restrained with zip ties inside the restaurant.
Two men were arrested outside the restaurant. They were identified as Kenneth Chipemba, 37, of Springboro, and Kabinga Kwambana, 22, of Cincinnati.
Both were charged with felony aggravated robbery and kidnapping. The case was scheduled to be presented to a grand jury later this week. More charges were expected.
Detectives were trying to determine if the two men might be responsible for several similar robberies at Golden Corral, Bob Evans and Cracker Barrel restaurants in Ohio and Kentucky.
Police said employees at a Fricker's near Dayton also reported a robbery involving two masked men with zip ties and a shotgun.
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