Jason McLemore, a 44-year-old Mississippi gun store owner, and his 17-year-old son, Jacob, were killed in a shootout with two customers after an argument with two customers stemming from a $25 firearm repair fee, police announced over the weekend.

The exact time of the shooting has yet to be determined, but police confirmed it was reported a little after 3:00 p.m. Saturday at the McLemore Gun Shop on Hwy 43 North near Henley Field, reported CBS' and ABC's combined Mississippi affiliate WLOX-TV. The incident began when Audy McCool, 52, and his son, Michael, 29, went to the gun shop to pick up a gun one of them had left for repairs. However, they were told that the gun had yet to be serviced, and one of them became upset about that fact, since he had already paid $25 for it.

Jason McLemore's wife reportedly saw the encounter unfold, and tried to call her husband and son to prevent it from escalating.

"During this argument, we believe there might have been some pushing and shoving," Chief Deputy Shane Tucker said, according to the Sun Herald. "One of the customers and one of the owners produced firearms. We don't know who shot first." 

By the end of the shootout, both Jason and Jacob were dead, while Audy had to be airlifted to a Hattiesburg hospital and Michael to a New Orleans medical center to be treated for serious injuries.

The shooting is still under investigation with the Pearl River County Coroners Office and the Mississippi Bureau of Investigation on the scene, reported NBC's New Orleans affiliate WDSU-TV. No charges have been filed.