U.S. Secretary of State John Kerry and Russian Foreign Minister Sergey Lavrov shake hands during a photo opportunity but without speaking to reporters, in Vienna, Austria, Oct. 23, 2015.

The talks are expected to focus on ways to resolve the Syrian crisis

Russian Foreign Minister Sergei Lavrov and U.S. Secretary of State John Kerry held their bilateral meeting in Vienna on Oct. 23.

Their talks were held behind closed doors at Vienna's Imperial Hotel and lasted for 1.5 hours.

The two countries' delegations joined the ministers around 40 minutes after the negotiations began.

Lavrov and Kerry arrived in the Austrian capital to attend multilateral talks on Syria and a meeting of the Middle East Diplomatic Quartet, which has started after the bilaterial talks. The four-party meeting involves Russian Foreign Minister Sergei Lavrov, U.S. Secretary of State John Kerry, Saudi Foreign Minister Adil al-Jubayr and Turkish Foreign Minister Feridun Sinirlioglu.

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