A worker at the South Bay Stop & Shop, 1100 Massachusetts Ave. in Dorchester, was stabbed shortly before 10 p.m. by somebody in a group of eight to nine men who fled the scene.
Police said two of the men had knives. A third man had a BB gun.
It's the second time this week that a Dorchester supermarket worker was stabbed. On Wednesday, a man was stabbed at the Lower Mills Star Market, allegedly as the result of an argument and fight over whether he was shirking his job.