Turkey, Russia and Iran have agreed to set up a process to help enforce a partial ceasefire in Syria. Negotiators for the three sides met for two days of talks with Syrian government and rebel representatives in Astana, the capital of Kazakhstan. The three also agreed to support efforts to find a political solution to the Syrian civil war. Turkish Prime Minister Binali Yildirim said Wednesday that the meetings were, in his words, “a serious diplomatic success.” Yildirim said that any resolution of the conflict should involve a new Syrian government that represents “all factions.” A major point of disagreement in earlier talks has been the influence of Syrian President Bashar al-Assad in any new government. Turkey supports the Syrian rebels. They want Assad to leave power. But Assad’s supporters, including Russia, want him to remain as president. A statement released at the end of the talks said the Syrian government and opposition should meet next month in Geneva, Switzerland.