abidjan three unite nations soldier bangladesh kill explosive device detonate escort convoy northern mali sunday west african country peacekeeping mission bangladesh military say attack peacekeepers mali islamist group continue operate vast desert north country make u.n. mission minusma organization deadly another five u.n. troop seriously wound sunday explosion occur around a.m. 0700 gmt main road towns anefis gao minusma say statement thoughts go firstly families love ones pledge complete support painful ordeal head minusma koen davidse say mission use mean ensure justice render u.n. immediately release nationalities soldier bangladesh military media department confirm three soldier die improvise explosive device encounter militants add four bangladeshi peacekeepers injure attack west africa arid sahel region recent years become breed grind jihadist group link al qaeda islamic state european countries particularly france fear could threaten europe leave unchecked despite 2013 french-led military operation drive back militants seize control mali north area remain home group stag assault high-profile target capital bamako burkina faso ivory coast minusma establish wake french intervention struggle quell unrest u.n. security council establish sanction regime month allow body blacklist anyone violate obstruct fragile 2015 peace deal sign mali government separatist group anyone attack peacekeepers hind delivery aid commit human right abuse recruit child soldier could also face sanction include global travel ban asset freeze explosion mali kill three u.n. soldier bangladesh