Sudanese paramilitary forces carried out drone strikes overnight in central Sudan, killing at least 15 people and wounding dozens, health officials said Thursday, as the use of unmanned aircraft becomes increasingly common in the more than three-year war in the African country. The attacks, which started late Wednesday, targeted various areas of the city of el-Obeid, including near an army position, according to two health officials at el-Obed Hospital, which received the victims.