The shooting occurred in the back of Gipson's Discount Foods, 1434 U.S. 80 in west Jackson.
About 4:50 p.m., police responded to a call of a man being shot at the business, Jackson Police Department Assistant Chief Lee Vance said.
The grocery store is closed on Sundays.
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“Our preliminary investigation shows the deceased was attempting to break in when a resident living inside shot and killed him,” Vance said.
The suspect, who did not have any identification, was carrying a large knife and a handgun, Vance said. He was shot when he reached for one of the weapons.
Police found the suspect dead near the rear door.
Hinds County Coroner Sharon Grisham-Stewart said the suspect was shot once in the chest with a shotgun.
She said she hopes finger prints will be able to help identify the suspect, who is believed to be in his mid-20s.
The death is the city's 28th homicide.
Police are not releasing the name of the shooter because he is not expected to be charged. Read more