海上油轮频遭神秘“水雷”袭击，幕后黑手一度直指乌克兰

Group 1 - A series of limpet mine attacks on oil tankers has raised concerns about potential state-sponsored sabotage activities, with speculation pointing towards Ukraine and Libya as possible actors [1][2] - Five vessels have been attacked this year, with the most recent incident involving the Greek-owned "Vilamoura" tanker, which experienced flooding in its engine room while sailing off the coast of Libya [1][2] - All attacked vessels had docked at Russian ports in the weeks leading up to the incidents, leading security experts to suggest a connection to Ukraine, although the nature of the "Vilamoura" attack has opened up other theories, including involvement from Libya [1][2] Group 2 - The recent attack on the "Vilamoura" tanker follows a similar incident in January and three more in February, primarily occurring in the Mediterranean, with one incident in the Baltic Sea [2] - Maritime security expert Martin Kelly noted that while there are similarities between the recent and earlier incidents, there are also various other possibilities, including actions from Libyan actors and other capable state actors [2] - The United Nations International Maritime Organization has expressed concern over the series of explosions, indicating that they will closely monitor the events and their investigations [2] Group 3 - Four of the attacked vessels belong to well-known Greek and Cypriot shipowners, including the "Vilamoura," which is part of George Economou's Cardiff Group [3] - Other vessels involved in the incidents include the "Seacharm" and "Seajewel," owned by Nikolas Martinos' Thenamaris Group, and the "Grace Ferrum," owned by Cyprus-based Cymare [3] - TMS Tankers confirmed that their vessel suffered an engine room explosion after loading 1 million barrels of crude oil from Libya's Zuwetina port, with no casualties or pollution reported [3] Group 4 - Thenamaris has acknowledged that its vessels encountered "security incidents" at different times and locations in the Mediterranean earlier this year, emphasizing compliance with international and European regulations [4]