A government-led military operation against various armed groups in the Ituri region of the Democratic Republic of Congo has caused hundreds of thousands to flee the region.
The UN refugee agency said it was "very worried" about the fate of what could be 85 migrants lost in Mediterranean Sea.
More than 500 rescued migrants are stuck in the Mediterranean on two NGO boats as Italy and Malta continue to deny them access to their ports.
At least a million Syrians have fled to Lebanon since the start of the civil war in 2011, but according to a Human Rights Watch report Beirut forced some of them back to Syria
UNHCR says some 5.6 million Syrian refugees still remain in five neighbouring countries, and $5.5 billion is required to support the refugees, including a million babies born in displacement.
Growing numbers are fleeing economic meltdown and political turmoil in Venezuela, where people scrounge for food and other necessities of daily life, threatening to overwhelm neighbouring countries.
Italian coast guard vessel Diciotti docks in the Sicilian port of Pozzallo with 522 migrants and a corpse, UN refugee agency says.
The protest erupted when some 3,000 refugees converged on the camp to demand that their rations remained uncut. The refugees died as police attempted to disperse them.
Two Americans and a Briton believed to be the first western miltants backing the YPG were killed in Raqqa province. Separately, a Russian military instructor was killed in Hama province.
A spokesman for the UNHCR said it was too early to say if the returnees were directly linked to a drop in violence.
The statistics are dire, even with resettled refugees not included. We are living in a time in history when 42,500 people are forcibly displaced from their homes, every day
Muslim clerics in Egypt, Morocco, Yemen and Saudi Arabia rule zakat or mandatory alms can be donated directly by Muslims for relief work, UN High Commission for Refugees says.
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