GENEVA  - The UN refugee agency said Tuesday it has sent emergency teams to countries surrounding Mali to help them deal with an influx of more than 20,000 people who have the fled fighting there.  Clashes between rebel Tuareg groups and governmental forces in the Azawad region of northern Mali broke out in mid-January. In the past three weeks, at least 10,000 people are reported to have crossed to Niger, 9,000 have found refuge in Mauritania and 3,000 in Burkina Faso, the UN High Commissioner for Refugees (UNHCR) said.