Police say an Atlanta Subway worker was shot and killed by customer over sandwich order

Two Atlanta Subway workers were shot, one fatally, following an argument over a sandwich order, police said Monday. 

An irate customer fatally shot a 26-year-old female employee and critically wounded her 24-year-old female co-worker shortly after 6:30 p.m on Sunday over "too much mayo on a sandwich," Atlanta Police Deputy Chief Charles Hampton Jr. said in a news conference. 

Atlanta police arrested a 36-year-old man in connection to the fatal shooting late Sunday following a tip from a citizen, he said.