"The top United Nations refugee official has warned that Syria's worsening humanitarian crisis risks overwhelming the international community's capacity to respond, and that some aid agencies could run out of money for relief activities as early as the end of this month," the U.N. News Centre reports. Speaking to U.S. senators in Washington, D.C., on Tuesday, High Commissioner for Refugees António Guterres said, "What is happening in Syria today risks escalating very quickly into disaster that could overwhelm the international response capacity -- political, security-related and humanitarian," according to the news service, which adds, "He stressed the urgent need for a political solution" (3/20). "In addition to 3.6 million people internally displaced by Syria's civil war, registered refugees in the four neighboring countries now total 1.1 million, compared with just 33,000 last April," according to Guterres, who noted an additional half a million unregistered refugees have left Syria, the Washington Post reports (DeYoung, 3/19).