Muntari is alleged to have slapped Ghana management committee member Moses Armah Parker.
A statement from the Ghanaian FA read: "The Ghana Football Association (GFA) has suspended Sulley Ali Muntari indefinitely from the Black Stars with immediate effect.
"The decision was taken in the wake of his unprovoked physical attack on an Executive Committee member of the GFA and a management member of the Black Stars, Mr. Moses Armah on Tuesday 24th June, 2014 during a meeting.
"Muntari’s accreditation for the 2014 World Cup has been withdrawn with immediate effect."
Boateng is alleged to have insulted coach Appiah during a training session.
The Ghanaian FA said: "The Ghana Football Association (GFA) has approved coach Kwesi Appiah’s decision to suspend Kevin-Prince Boateng indefinitely from the Black Stars. The decision takes immediate effect.
"The decision was taken following Boateng’s vulgar verbal insults targeted at coach Kwesi Appiah during the team’s training session in Maceio this week.
"Boateng has since showed no remorse for his actions which has resulted in the decision. Boateng’s accreditation for the 2014 World Cup has been withdrawn with immediate effect."
The former Tottenham and Portsmouth midfielder told Sportbild: "Yes, I am leaving. I am no longer part of the team."
- Sports & Recreation
- Ghana Football Association
- Kwesi Appiah
- Sulley Ali Muntari