The European Union’s diplomatic chief and Iran’s foreign minister met Saturday in New York to discuss the war in Syria ahead of a UN push for peace talks.

The European Union's diplomatic chief and Iran's foreign minister met Saturday in New York to discuss the war in Syria ahead of a UN push for peace talks.

A key ally of President Bashar al-Assad, Iran has joined the diplomatic efforts to end the four-year war that has killed more than 240,000 people.

EU diplomatic chief Federica Mogherini and Iranian Foreign Minister Mohammad Javad Zarif "underlined the need to bring the war in Syria, which has caused so much suffering, to an end," said an EU statement.

"They expressed their readiness to cooperate within UN-led efforts and exchanged views on how to contribute to that end," it added.

US Secretary of State John Kerry is also due to meet with Zarif on Saturday in New York as is Russian Foreign Minister Sergey Lavrov on Monday.

The United Nations had hoped to get a new round of peace talks off the ground this month, but Russia's military build-up in Syria threw a spanner in the works.

The UN peace talks led by envoy Staffan de Mistura would be coupled with the creation of an international contact group that would include Iran.

US President Barack Obama will sit down with Russian leader Vladimir Putin on Monday for talks that could prove crucial in charting the way forward.

The foreign ministers of the five permanent Security Council members -- Britain, China, France, Russia and the United States -- will meet Tuesday with De Mistura and UN Secretary-General Ban Ki-moon.