Investigators say one of the suspects, wearing a T-shirt that concealed his nose and mouth, walked to the store's cooler while the other suspect, armed with the shotgun, stood at the door.
Investigators say as one suspect was removing beer from the cooler, the second suspect fired one shot at the clerk, who was able to duck and avoid being struck. A customer in the store was not injured.
The man with the shotgun is described as 20 to 25 years old, 5-feet-5 to 5-feet-9 inches tall, 190 to 210 pounds, with dark hair and a mustache. The man with his face covered is described as 20 to 25 years old, 5-feet-7 to 5-feet-9 inches tall, and 210 to 230 pounds.
In May, a clerk at the same 7-Eleven was shot during an attempted robbery. He recovered from his wound.