From Peace Corps Twitter–
“All Peace Corps Mali Volunteers and Staff are safe and accounted for. PC Mali has eyes on all Volunteers (and/or direct voice contact with them). We are in communication with the Embassy and will keep Volunteers and Staff updated of the security situation in Bamako.”
There is a Peace Corps contingent in Mali.
From the Peace Corps website: http://www.peacecorps.gov/volunteer/learn/wherepc/africa/mali/
“There are 39 Peace Corps Volunteers in Mali working with their communities on projects in community economic development and health. During their service in Mali, Volunteers learn to speak local languages, including Bambara, French, Malinke, Minianka, and Senoufou. More than 2,645 Peace Corps Volunteers have served in Mali since the program was established in 1971.”