Norwich have vowed to ban anyone found to have subjected boxer Anthony Ogogo to racial abuse following the Carabao Cup defeat at Arsenal.
London 2012 Olympic bronze medallist Ogogo was at the Emirates Stadium on Tuesday night to watch the Canaries as they suffered a 2-1 extra-time loss, having earlier looked set for a shock victory.
The 28-year-old middleweight, who grew up in Lowestoft and had a spell in Norwich's youth squad, highlighted the problems in a series of posts on Twitter following the match.
Ogogo wrote he felt "utterly disgusted" by the abuse allegedly directed his way, which was, he later said in quotes to the BBC, from "an older guy.