A Harford County man has been arrested in the armed robbery of a Dollar General store in Aberdeen, police said.

Cornelius Alexander, 40, of the 700 block of Pulaski Highway was arrested Saturday and charged with robbery, assault and use of a handgun in the commission of a felony.

Police said a man used a BB gun to take more than $500 from the store in Aberdeen Plaza near West Bel Air Avenue on Saturday morning. Aberdeen police officers were near the shopping center about 11:30 a.m. when they received a call about the robbery. They spotted the suspect getting into his car and arrested him.

Officers found money and a BB gun in the vehicle, said Sgt. Fred Budnick, an Aberdeen police spokesman.