Jordan's King Abdullah, the Iraqi prime minister and Saudi Arabia's foreign minister are among those expected at a conference opening in southern Germany, after diplomats agreed to work toward a temporary "cessation of hostilities" in Syria's civil war.

The Munich Security Conference, an annual gathering of foreign and defense policy leaders, runs Friday through Sunday. Syria is expected to loom large at this year's event, which also features U.S. Secretary of State John Kerry, Russian Foreign Minister Sergey Lavrov and Prime Minister Dmitry Medvedev, among others.

Abdullah, whose country neighbors Syria and is home to large numbers of Syrian refugees, is to address the meeting Friday. He's to be joined by Iraqi Prime Minister Haider al-Abadi and Saudi Foreign Minister Adel al-Jubeir. Iran's foreign minister also is expected to speak.