Islamist militants killed 15 soldiers and three civilians during two separate attacks in southwest Mali on Wednesday, the army said in a statement. Six soldiers died and 25 were wounded when militants assaulted a military camp in Sonkolo, a rural commune in the south-central Segou region, more than 300 kilometres (186 miles)north of the capital Bamako. Nine soldiers and three civilians were killed during an early morning attack on a different camp in the southwestern town of Kalumba, the army said. Another military base in the central town of Mopti also was attacked during the night, but the a…