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A 36-year-old Atlanta man was arrested Sunday after he gunned down 2 young women during a dispute over too much mayonnaise at a downtown Atlanta Subway shop.

26-year-old Brittany Macon, was later pronounced dead, and a 24-year-old co-worker, who was shot in front of her 5-year-old child, is in critical condition at a local hospital.

The shooting happened Sunday evening at a Subway connected to a Circle K on Northside Drive.

A customer became enraged over the amount of mayonnaise on a sandwich and pulled out a gun and started shooting shortly after 6:30 p.m., according to Atlanta police.

A dozen police units swarmed the location within minutes of the shooting.

“What you are seeing behind me is the result of a tragedy,” interim police Chief Darin Schierbaum told reporters from outside the Subway restaurant. “A senseless tragedy that we’ve seen numerous times throughout the year where an argument leads to gunfire, and now we have someone dead.”

Within a few hours, a tip lead police to the suspect, and he was arrested late Sunday not far from the restaurant, according to the Atlanta Journal-Constitution.

Deputy police Chief Charles Hampton declined to release the suspect’s name on Monday, citing the ongoing investigation.

Willie Glenn, who co-owns the Subway location, told Channel 2 Action News both women started working there earlier this month.

“It breaks my heart to know that someone has the audacity to point a weapon and shoot someone for as little as too much mayonnaise on a sandwich,” Glenn said.