On Wednesday, the Gambian press union, one of the most harshly persecuted groups under Jammeh, said he must back down.
Diplomats say if negotiations fail, force may be an option
For 22 years, Jammeh, a former junior army officer, mixed charm and generosity with the threat of violence to maintain a firm grip on power
President Ali Bongo says he seeks to bring opposition into the fold.
Ping, a lifelong political insider in Gabon who has also served as chairman of the AU Commission, declined to comment directly on the ruling.