The Club confirmed it has penalized the Coach for unsporting and unethical behaviors which violates the code of conducts of the Club.
The decision was made after an emergency board meeting on Monday.
Hearts of Oak have also appointed some board members to investigate the matter and bring out a final decision.
Nuttal for the meantime have been asked to excuse himself from the first team until further notice.
Assistant Coach Henry Willington meanwhile have been asked to temporarily take charge of the team.
Join GhanaStar.com to receive daily email alerts of breaking news in Ghana. GhanaStar.com is your source for all Ghana News. Get the latest Ghana news, breaking news, sports, politics, entertainment and more about Ghana, Africa and beyond.