AUBURN, Maine (AP)   IHOP’s president says the restaurant chain has “zero tolerance” for discrimination after a server asked a group of black teenagers to pay upfront for their meal at a franchise in Maine.

President Darren Rebelez on Tuesday called the episode in Auburn, Maine, an “isolated incident” and reiterated the restaurant is reaching out to the teenagers to apologize. He also said “appropriate disciplinary actions” will be taken.

The Auburn location will be closed Thursday for training.

Local Manager Melvin Escobar said the restaurant had had problems with teens walking out without paying, but he said the waitress’ actions were wrong. He said that “this is the first time it happened, and that will be the last time.”