Investigators said Wednesday that they aren't sure yet if the crimes are connected.
Two men robbed Bojangles’, at 5435 S. Miami Blvd., around 9:45 p.m. Friday.
One of the robbers was black, wore a tan or yellow hoodie, gloves and black boots. He was carrying a handgun.
The second robber was black, wore a gray hoodie and a T-shirt over the lower half of his face. Police say they believe he was carrying a toy assault rifle with a tiger stripe or camouflage pattern on it.
Cruizers convenience store, 4706 N.C. Highway 55, was robbed shortly before 1:30 a.m. by an armed black man wearing a black hoodie, a black and white skeleton mask, a white T-shirt, white shoes, white gloves and black pants.
An employee at Dollar Tree, at 4900 N.C. Highway 55, was robbed late Saturday as she was going to her car after work.
Police say a man in a white mask pushed her into the car, took cash and fled with two other men wearing white masks in a dark-colored four-door sedan.
Investigators said that one of the men ran into the side of a moving vehicle but got up.
One of the men was black, in his late teens or early 20s, had a medium build and stood 5 feet 6 inches to 5 feet 8 inches tall.
A second man was described as being white, in his late teens or early 20s with blond hair and an olive complexion. He had a medium build and stood 5 feet 6 inches tall.
The third man was described as being black, in his late teens or early 20s and standing 5 feet 8 inches to 5 feet 9 inches tall with a medium build.
Anyone with information can contact Durham police at 919-560-4415, extension 29306, or call Crime Stoppers at 919-683-1200.
Crime Stoppers pays cash rewards for information leading to arrests in felony cases and callers never have to identify themselves.