Five UN peacekeepers have been killed and up to six others severely hurt in an attack on their convoy in northern Mali.<br /><br /> According to officials, the ambush took place close to Goundam, a town southwest of the northern city of Timbuktu.<br /><br /> It is understood the victims were from the mission’s Burkina Faso contingent.<br /><br /> A French-led military campaign in early 2013 liberated the north of the country from al-Qaeda linked Islamist rebels who seized control of the area after a Tuareg uprising led to a military coup that plunged Mali into chaos.