Russian Foreign Minister Lavrov stand with U.S. Secretary of State Kerry before a meeting in Vienna, Austria.

Russian Foreign Minister Sergei Lavrov and U.S. Secretary of State John Kerry on Wednesday held a phone call in which they discussed ways for the international community to help support efforts to end the Syria crisis, Russia’s foreign ministry said.

Their discussion included ways to form a united Syrian opposition delegation so as to swiftly improve Syrian national political dialogue and to consolidate positions on fighting terrorism, the ministry said in a statement on its website.

It added the call took place on the initiative of the United States.

Meanwhile, Russian President Vladimir Putin and Turkey’s President Tayyip Erdogan also held a phone conversation and shared their opinions on the Syria crisis in light of ministerial meetings in Vienna last week, the Kremlin said on Wednesday.

Both sides confirmed they were willing to continue political dialogue, it said.

Earlier, Lavrov said on Wednesday that before the next round of Vienna talks on Syria, it is essential to decide who to consider terrorists and who the opposition members are.

Lavrov also said Moscow actively supports efforts of U.N. Syria envoy on the Syrian crisis.

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