Toure has been suspended by the Premier League side after an A sample contained a ‘specified substance’.
His club released a brief statement last night, which read: “Manchester City confirm that the FA has informed Kolo Toure that an ‘A-sample’ provided by him has tested positive for a specified substance.
“As result of this, he has been suspended from participating in all first team and non-first team matches pending the outcome of the legal process.”
And FA chiefs added: “The FA can confirm that a player has been provisionally suspended from playing pending investigation, having tested positive for the use of a prohibited substance.”
Toure now faces a ban of up to two years.
The World Anti-Doping Agency (WADA) website states: “Generally speaking, ‘specified substances’ are substances that are more susceptible to a credible, non-doping explanation. The sanction under the World Anti-Doping Code can go from a warning to a two-year ban.”