A taron da aka gudanar a birnin lstanbul da ya samu halartar shugabanin ƙasashe huɗu da suka haɗa da na Faransa, Rasha, Jamus da Turkiyya an ɗauki matakin samar da zaman lafiya a Siriya ta kafa kwamitin kafa kundin tsarin mulki a ƙasar.
