The Canaries forward has informed the club that he was sent racially abusive messages via the social networking site, with police now investigating the incident
The allegation comes just a week after Sunderland striker Fraizer Campbell was sent a racially abusive tweet, which was also investigated by police.
Norwich chief executive David McNally thanked fans and internet users for bringing the abuse to his immediate attention.
McNally posted on his Twitter page: “Thank you for the information regarding racist tweets. We have handed details to the police and cannot comment any further."
The former Everton forward, who is currently sidelined with a knee injury, told Leicester City’s Lee Peltier he didn’t know who was responsible, tweeting: “Dunno pal just some loser giving it cos he feels like a big man on the computer.”