The youngest of the trio passed away in Manchester on Thursday.
A statement said: "A tough day for the Toure brothers. Just hours after the match Colombia v Cote d'Ivoire (2-1), Kolo and Yaya have learned of the death of their younger brother Toure Oyala Ibrahim. The entire Ivorian delegation to Brazil supports them in this painful circumstance.
"The president of the Ivorian Football Federation (FIF) and the Executive Committee are to inform the family of Ivorian football, the death of Ibrahim Toure occurred on Thursday June 19 in Manchester.
"In these painful circumstances, the players of the national team of Cote d'Ivoire as well as the entire Ivorian delegation present in Brazil at the 2014 World Cup are to demonstrate their compassion Toure brothers, members of the Elephants and the great Toure family."
Yaya played against Colombia while Kolo was an unused substitute.