Since then, according to data compiled by Harvard Haugstvedt of Oslo University's Centre for Research on Extremism, the group has launched more than 20 further attacks on commercial ships and shore facilities.

此后，根据奥斯陆大学极端主义研究中心哈佛·豪格斯特维特编制的数据，该组织对商船和岸上设施发动了 20 多起进一步袭击。