Russian peacekeeping troops deployed to the war-ravaged enclave of Nagorno-Karabakh in the early hours of Tuesday as part of a ceasefire deal President Vladimir Putin said should pave the way for a lasting political settlement of the conflict there.
The U.S. State Department on Saturday said it welcomed news of a ceasefire in Northwest Syria - the last rebel bastion in the country - and urged for an end to attacks on civilians.
Turkey and Russia have prepared an agreement for a ceasefire in Syria, Turkey's foreign minister said, adding Ankara would not budge on its opposition to President Bashar al-Assad staying in power.
Iranian Foreign Minister Mohammad-Javad Zarif said on Wednesday that Iran, Russia and Turkey cooperate for establishment of a lasting ceasefire in Syria to bring about a political solution to the crisis in the country.
Iran has expressed concern over the possibility of militants taking advantage out of the Syrian truce.
The United States and Russia hailed a breakthrough deal on Saturday to put Syria's peace process back on track, including a nationwide ceasefire effective from sundown on Monday.
