The alert comes after two armed robberies were reported Thursday.
Authorities said the first incident happened around 9:30 p.m. in the 3500 block of Gillespie Street in Fayetteville at the Lake Lynn Short Stop. They said three African American men, wearing hoodies and blue jeans, robbed a convenience store customer at gunpoint in the parking lot.
The victim told investigators that one the suspects approached the driver's side of his vehicle, pointed a gun at him and demanded money. When the victim told him he didn't have any money, the suspect grabbed the victim's cell phone and fled the scene.
Sheriff's spokesperson Debbie Tanna said the crooks made their getaway in the woods behind the store.
About an hour later just after 10:30 p.m., deputies said a clerk at the Kangaroo convenience store at the intersection of Camden Road and Natal Street flagged them down to report a robbery.
"There were three males that walked into the store dressed in hoodies ... their ethnicity is unknown," Tanna said. "They were carrying handguns and they demanded cash. They did escape with an unknown amount of cash and some cigarette lighters."
Authorities said no one was hurt in either incident and it is unclear if they are related.
Anyone who may have information about the crimes are urged to contact the Cumberland County Sheriff's Office at (910) 323-1500 or call the TIPSLINE at (919) 484-TIPS (8433).