Houston police said four armed men held up the Wells Fargo Bank inside the Randall's store on Memorial Drive in Town and Country Village at about 8:50 a.m.A trail of cash, including $20 bills and stacks of $50 bills, was left behind in the grocery store’s parking lot, investigators said.The group originally got away in a Dodge pickup truck, but it was abandoned nearby, detectives said. Officials said the group got into a green Mercury Grand Marquis and headed toward the Katy Freeway.Descriptions of the robbers have not been released.Anyone with information is asked to call Crime Stoppers at 713-222-TIPS.