Doctors Without Borders halts work in Mali Fighting in Mali attributed to Tuareg rebels has forced aid group Doctors Without Borders to suspend work. BRUSSELS, Feb. 7 (UPI) -- Fighting in Mali has displaced more than 20,000 people and forced aid group Doctors Without Borders to suspend work, an aid director said. A representative for the U.S. State Department said last week that Washington was "deeply concerned" about reports of violence in northern Mali. Washington late last year issued a travel advisory out of concern that al-Qaida was plotting against Western targets in the region. Pierre Verbeeren, director general of Doctors Without Borders, said from Belgium the agency had to halt operations because of the security situation in Mali. "The conflict makes the situation very insecure for our teams and the population," he told the BBC. The population is leaving so it is very difficult for us to reach them, so we decided to suspended temporarily the activities to deliver primary health care, medicine and sometimes food. Last week, Malian President Amadou Toure called for calm as ethnic tensions simmer in the West African country.