Gaykhatu heard of Arghun's death in his wintering pastures near Antalya from Lagzi Küregen (son of Arghun Aqa and in-law of Hulagu Khan). The main contenders for the throne were his nephew Ghazan and cousin Baydu. Baydu was nominated for the throne by an influential Mongol commander, Ta'achar, who had sent an envoy to Gaykhatu falsely announcing that Baydu had already taken the throne.