MINNEAPOLIS — The Minnesota Vikings’ internal security staff is investigating after a fan said another man directed racist comments at him during Sunday’s game.

Deepinder Mayell wrote in an op-ed published Wednesday in the Star Tribune that he was at Sunday’s game against the Seattle Seahawks when another fan demanded to know if he was a refugee and made other comments Mayell considered to be  hate speech. Mayell described himself as non-white.

Mayell wrote that he reported the man to security but the man wasn’t asked to leave.

The Vikings said in a statement that they first learned of the incident from the op-ed.