Police are being called in to investigate claims Manchester City midfielder Yaya Toure was racially abused within hours of reactivating his Twitter account.
Toure rejoined the social-networking site on Monday, five months after leaving in order to focus on the World Cup.
The Ivory Coast international posted his first tweet at 1800 GMT, reflecting on City's derby win over Manchester United the previous day.
He wrote: "Great to be back on Twitter after a good win yesterday. Now my focus is on the next game."
Within hours of posting the message, the 31-year-old received abusive and racist messages from other users.
