Foxborough police are searching for a man who robbed a jewelry store on North Street Wednesday morning. The man allegedly walked into Crown Jewelers about 10:45 a.m., showed a gun, and took an undetermined amount of cash and jewelry, Foxborough Detective Lieutenant John Hannon said. No injuries were reported. Police said the man is black, 5 foot 11, and has a stocky build. He was wearing a fleece jacket and a baseball hat at the time of the robbery, Hannon said. Anyone with information is asked to contact Foxborough police at 508-543-4343.