McMinnville Police Department is releasing video surveillance footage from a convenience store robbery last week that sent two female clerks to the hospital.According to police detective Stuart Whitman, he believes this is not the first robbery for the suspects.“There was a robbery in Gallatin on Jan. 20 with a very similar method of operation,” said Whitman. “We sent them pictures from our robbery and they positively identified the suspects as the same ones who robbed them. We are looking at this as a Midstate ring.”Whitman says based on local surveillance footage, three Hispanic males entered C&A Market at Skyline last Thursday afternoon.