专家：“北溪”爆炸事件关注度上升与当前俄乌局势密切相关

Group 1 - The investigation into the "Nord Stream" gas pipeline explosion has seen limited progress over the past three years, with Germany being the primary victim yet not actively pursuing the investigation [1][2] - The explosion has exacerbated the Russia-Ukraine conflict and further strained energy ties between Europe and Russia, with Denmark and Sweden terminating their investigations while Germany continues [1][2] - The complexity of the investigation is heightened by its ties to international politics, with various parties using the incident as a diplomatic tool, leading to a lack of transparency in the investigation process [2] Group 2 - Recent developments have brought renewed attention to the "Nord Stream" explosion, particularly following the arrest of a Ukrainian suspect in Italy, who was subsequently extradited to Germany [3] - The identification of a Ukrainian action group as responsible for the explosion has emerged, although the number of suspects apprehended remains low [3] - The ongoing geopolitical dynamics surrounding the Russia-Ukraine conflict are influencing the investigation, with the U.S. potentially using the exposure of details as leverage against Ukraine [3]