SAN DIEGO — Three thieves, one armed, stole several cases of beer from a 7-Eleven Wednesday night, said the San Diego Police Department.

The robbers walked into the convenience store, located at 3105 Fairmount Ave. in the Swan Canyon neighborhood, shortly before 9:20 p.m. and grabbed the alcoholic beverages before attempting to leave without paying, according to police.

Authorities say an employee tried to stop them, prompting one of the thieves to pull out a gun and point it at the employee who then ran away. Once outside, a bystander tackled one of the robbers. At that time, the robber fired two shots at the bystander but missed, police said.

The thieves then got into an unknown vehicle with the beer. They were last seen heading eastbound on Thorn Ave. Their descriptions, according to authorities, are as follows:

A Hispanic man in his 20s with a thin build, wearing a black hat, black jacket, black pants, white shoes and a maroon hoodie under the jacket; a Hispanic man in his 20s with a thin build, wearing a black hat, black jacket, black pants and black shoes; and a Hispanic man in his 20s with a medium to heavy build, wearing a light blue and grey hat, black jacket, black pants and black shoes.

San Diego police robbery detectives are investigating the incident. Anyone with information related to the robbery at the 7-Eleven is encouraged to call Crime Stoppers at 888-580-8477.