U.S. Secretary of State John Kerry arrived in Saudi Arabia late Saturday to hold talks with King Salman Sunday about ongoing conflicts in Syria, Libya and Yemen.

Before departing for Vienna later on Sunday, Kerry was also scheduled to meet the Saudi crown prince, deputy crown prince and foreign minister, the Associated Press reported. Kerry is also scheduled to meet Italy's foreign minister, as well as his Russian counterpart Sergei Lavrov, in Vienna next week.

The U.S., its regional allies, some European nations and Russia are trying to secure peace in the three strife-torn countries, but their attempts so far have failed to reduce the violence in the region.

In a meeting in Vienna with Italian Foreign Minister Paolo Gentiloni, Kerry is expected to discuss the security situation in Libya and support for its United Nations-backed unity government.

shaky ceasefire in Syria has been repeatedly violated by the regime forces of President Bashar Assad and the opposition — an issue, which will be the focus of discussion in the meeting of the International Syria Support Group Tuesday. The 17-nation group will also convene in Vienna and is likely to discuss the delivery of humanitarian aid by the U.N.

Meanwhile, peace talks in Yemen between the pro-government forces and Houthi rebels, being held in Kuwait, were called off after Houthi fighters seized a military base on May 1.

After the meetings in Vienna, Kerry will head to Brussels for a meeting with the foreign ministers of NATO countries, according to the Voice of America. He will then head to Myanmar next to show U.S. support for its newly-elected government, before joining President Barack Obama in Vietnam in the following week.