The U.N. High Commissioner for Refugees cites a "surge" of arrivals into Congo's Ituri province since clashes erupted Jan. 19 between the South Sudanese army and a rebel group, the National Salvation Front.
UNHCR said Tuesday that thousands of people - mostly women, children and the elderly - arrived by foot over the weekend in northeastern Congolese villages near the border town of Ingbokolo.
Another 8,000 are reported to have been internally displaced near the South Sudan town of Yei.
Last week, the U.N. envoy for South Sudan, David Shearer, said fighting there had "diminished greatly" since a peace agreement was signed in September.
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