Dunkin’ Donuts and Canton police are offering a cash reward for information leading to the arrest of a man who has robbed a string of the chain’s shops in the region. The robberies have taken place in Canton, Newton, West Roxbury, Westwood, Norwood, Walpole, Plainville, Norton, North Attleborough, Raynham, Dedham, and Easton. The reward is $2,500. The suspect is described as a white, Hispanic man who wears a hooded sweatshirt, a black mask, and carries a black handgun. Anyone with information is encouraged to contact the Canton Police Department’s Bureau of Criminal Investigations at 781-828-1214, extension 300 or 303. Information may also be left at the Canton Police Department’s website at www.cantonpolice.com under the “contact information” tab. Dunkin’ Brands Inc. is based in Canton.