Four UN Peacekeepers Killed in Mali Attack, UN Says

Islamic extremists have killed four U.N. peacekeepers in Mali, the U.N. mission in Mali said Friday. 

The incident occurred at the peacekeepers' camp in Aguelhok, in the northern part of the country. The camp is home to mostly Chadian peacekeepers.  Helicopters were dispatched to the camp to evacuate the wounded, the U.N. said, adding that several of the "heavily armed" attackers were killed.   The extremist movement in northern Mali began in 2012 when rebels seized control of several northern cities. In 2013, they were forced from power in a French-led operation.