3 dead, 20 wounded.[187] 3 20 United States December 2 In the 2015 San Bernardino attack, married couple Rizwan Farook and Tashfeen Malik shot and killed 14 people and injured 22 others in a killing spree that the FBI was investigating as "act of terrorism".[188][189] 14 22 Chad December 5 Four female suicide bombers from the militant Islamist group Boko Haram attacked the Chadian island of Koulfoua on Lake Chad, killing at least 15 people and injuring 130.[190] 19 130+ Yemen December 6 The governor of the southern port city of Aden in Yemen, Jaafar Mohammed Saad, was killed in a car bomb attack.