The European Union called on Russia, Iran and Turkey on April 25 to ensure a halt to fighting in Syria, Hurriyet reports.
EU foreign policy chief Federica Mogherini said that Russia, Iran and Turkey have a "special responsibility" to establish a cease-fire and to press Syrian President Bashar Assad to return to the negotiating table.
"We are seeing an escalation in military activities which is exactly the contrary" to what they promised, Mogherini said.