ABU DHABI - Up to 335,000 Syrian refugees have registered with the United Nations, ten times more than in March, but the real figure could be as high as 500,000, a UN refugee agency official said on Tuesday.

The UNHCR said last month that up to 700,000 refugees may flee the violence in Syria by the end of the year, four times higher than its June prediction.

Most of those fleeing are taking refuge in neighboring Jordan, Lebanon and Turkey.

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