Russian club CSKA Moscow have denied that their fans racially abused Toure.
The Russian club's deputy media manager Michael Sanadze told Sky Sports News: "There is no subject to discuss. Nothing special happened.
"There was a lot of noise in the stadium. Nobody else, other than Yaya Toure, heard anything.
The only trouble that has come about was because Yaya Toure heard something."
More top news
After the Indiana polls close, ITV News asked Ted Cruz supporters if they could back Donald Trump as the Republican presidential nominee.
With his massive victory in Indiana, Donald Trump can now not be stopped from becoming the Republican nominee.
Donald Trump is predicted to win the crucial Republican Indiana primary, US media have projected.