A bomb explosive in southern Yemen has killed at least four people and wounded more than 20 others. Police said the bombing in the city of Dhamar, south of the capital Sana, targeted a gathering of the Shiite Muslim members of the Houthi rebel group. _____________________________________________________________ 在也门南部,一枚炸弹造成至少4人遇难,20多人受伤.警方称爆炸发生在首都萨那南部的扎尔马市,袭击目标是胡塞叛军组织中一群集会的什叶派穆斯林.