At the 7-Eleven, the man waited until the store at 8949 Williamsport Pike was empty and then approached the clerk about 1:35 p.m., Burnett said.
The suspect told the clerk to give him all the store's money and placed his hand in his jacket to indicate he had a weapon, Burnett said.
The robber then said he had a gun and to hand over all the money, prompting the clerk to give him an undisclosed amount of money in the register, Burnett said.
The suspect then left the store on foot, running north and around the back of the store.
After responding to the reported armed robbery, West Virginia State Police at the Martinsburg station learned that an attempted armed robbery happened about 1:15 p.m. at Bedington Crossroads Convenience Store at 408 Williamsport Pike, Burnett said.
Through a review of video surveillance, police determined the same man also was involved in the 7-Eleven robbery, but did not get any money at the Bedington store.
West Virginia State Police Sgt. K.W. Martin said the same suspect is believed to have robbed the Natural Food Store in Berkeley Plaza at about 7 p.m. Tuesday.
The suspect waited until the store was ready to close and told an employee that he had a gun under his shirt, Martin said. The man made off with $580.
Police were able to get a description of the vehicle the man was driving -- a green Jeep Wrangler with a tan top -- and found it later, Martin said. A chase then ensued on U.S. 11.
Martin said the suspect eventually got out of the Jeep and led police on a foot chase. The suspect got away after he ran into a wooded area, Martin said.
At about 12:30 a.m., troopers received a tip that the suspect had been witnessed near a bridge on Berkeley Station Road near the Berkeley/Jefferson county line, the news release said.
Senior Trooper D. S. See responded and stopped a a vehicle that was leaving the area.
The rear passenger, later identified as Vosburg, provided troopers with a false name. Vosburg was placed under arrest at this time for providing false information.
See also identified Collier as the front seat passenger.
-- Matthew Umstead and Dan Dearth