The U.S. military has carried out a drone strike in Somalia targeting a senior leader of the militant group al-Shabab. The Pentagon has said it does not believe any civilians were killed in the strike, but did not say whether the target was killed. Last week, on Christmas, al-Shabab attacked the African Union base in Mogadishu, killing nine people in what it said was retaliation for another U.S. drone strike which killed the group’s leader in September. On Saturday, another top al-Shabab figure who was the subject of a $3 million U.S. bounty surrendered to authorities in Somalia.