The Boston Police Department on Saturday arrested two men in Dorchester on charges they held up 11 convenience stores, gas stations and fast-food restaurants, mostly in Mattapan and Dorchester.

Gerald Sibley, 34, was charged with armed robbery, unlawful possession of a firearm and unlawful possession of ammunition, police say. Marion Griffin, 44, was charged with armed robbery.

Their most recent local holdup was 9:45 p.m. on Wednesday at Rosedale Market, 547 Washington St., when one of the two walked in, showed a gun and made off with cash and cigarettes, police say.

That was one night after the same man robbed the Mobil gas station at 1556 Blue Hill Ave., around 7:50 p.m.

Other Dorchester and Mattapan robberies they are suspects for:

• Sept. 6, 10:20 p.m., Dunkin' Donuts, 1580 Dorchester Ave.
• Sept. 6, 6:18 a.m., McDonalds, 1513 Dorchester Ave.
• Sept. 5, 8:30 p.m., D Market, 658 Washington St.
• Aug. 30, 8:33 p.m., St. Peter's Market, 419 Adams St.
• Aug. 29, 8:20 p.m., Woodrow Avenue Market, 67 Woodrow Ave.
• Aug. 31, 11:07 p.m., Mr. Convenience Plus, 646 Blue Hill Ave.

The two are also suspects for armed holdups in the South End and Brookline, police say.