New Bedford police said the suspect entered the Lucky Seven Grocery store just before noon Tuesday and pointed a knife at the 24-year-old clerk, the Boston Globe reported Thursday.
The clerk responded by drawing a sword he kept behind the counter. The robber fled the store without any loot.
Investigators described the suspect as a white male around the age of 40 and standing at approximately 5-foot-9. The man was described as having a heavy build and brown mustache.