SAN JOSE — Seven suspects have been arrested on suspicion of involvement in a September jewelry store smash-and-grab robbery that garnered international headlines and resulted in the store’s elderly owner suffering a stroke, authorities announced Friday. Twenty people, some armed, stormed a San Ramon jewelry store Sept. 22. “When hordes of criminals came to Santa Clara County over the last month to target neighborhood jewelry stores, they may have expected helpless victims and easy scores,” said Santa Clara County District Attorney Jeff Rosen. This was organized theft and violence, the kind of smash-and-grab attack we’ve seen spreading across the Bay Area and the entire state,” said San Jose Mayor Matt Mahan. There have been 30 violent jewelry store robberies across California since March, including 16 smash-and-grabs, Mahan added.