A 'black widow' linked to Russia's restive Northern Caucasus region could be behind the deadly suicide attack at Moscow's international airport and police were on the look out for four men who sneaked in with explosives。
Black widow常常以suicide bombing/ suicide attack(自杀式炸弹袭击)进行恐怖活动,实施这些袭击的人就是suicide bomber(人弹)。俄总统事后批评机场出现security lapse(安全漏洞)。多国领导人send a message of condolence(致电慰问)。目前还没有组织claim of responsibility(声称对这起事件负责)。之前,俄罗斯还曾发生serial metro blast/explosions(地铁连环爆炸)事件。
事件发生后,各国机场都在加强安保措施。北京机场将为airport patrols(机场巡逻队)配备更多bomb-sniffing dogs(嗅弹犬),并注意监视security camera surveillance(监控摄像头)。