A man was angry that there was too much mayo on his Subway sandwich.

So he opened fire inside the downtown Atlanta restaurant 

Two female employers were shot.  One was killed and the other was hospitalized with her injuries

The restaurant's manager returned fire but was unable to hit the disgruntled customer.

"Believe it or not, it was about too much mayonnaise on his sandwich," owner Willie Glenn said of the shooting.

To make the situation even more tragic, the injured employee's five-year-old son witnessed the shooting.

Police have a 36-year-old man in custody.