Kuwait is hosting an international donor conference to secure aid for Syrian refugees. The UN says it needs at least one billion dollars over the next six montnhs.
Iraqi authorities say a key Iraq-Syria border crossing has fallen into control of Islamic State insurgents. Monitors also say IS has executed more than 200 people around the ancient Syrian city of Palmyra.
International donors at a major summit have pledged $3.8 billion (3.5 billion euros) in humanitarian aid to conflict-ridden Syria. The amount is less than half of what the United Nations had requested in its appeal.
Palmyra has fallen to the "Islamic State." The capture of the Syrian city is IS's second major victory inside a week, after it seized Ramadi, capital of neighboring Iraq's western Anbar province, on Sunday.
In an interview with Saudi TV, Barack Obama said the war in Syria would not likely end before he leaves office in early 2017. He also affirmed his belief that there would be no "military solution" to the conflict.