Hagerstown police are investigating an armed robbery that occurred Wednesday morning at a Dual Highway convenience store, city police said.
Police received a report of an armed robbery in progress at the 7-Eleven at 1623 Dual Highway at 4:53 a.m., according to Hagerstown Police Department news release.
Officers were told a male wearing a blue, hooded sweat shirt entered the store, brandished a handgun and demanded money, the release said.
The robber left the store with an undisclosed amount of cash and escaped on foot, police said.
Authorities trying to alert citizens to the robbery accidentally used the wrong telephone-messaging format, officials said.
County residents can sign up on online for the emergency-alert system, choosing to receive messages about crimes, severe weather or utility problems, said Jason Kline, spokesman for the Washington County 911 center.