Group 1 - Recent explosions and fires at oil refineries in Hungary and Romania have raised international concerns, with speculation about potential Ukrainian involvement behind these incidents [1][3] - Both countries continue to purchase Russian oil, and the affected facilities are critical for processing Russian crude, indicating a possible link to geopolitical energy interests [3][4] - The timing of the incidents coincided with EU energy ministers discussing new restrictions on Russian oil imports, adding complexity to the nature of these accidents [4] Group 2 - There are suspicions that Ukraine may have orchestrated these attacks to pressure Hungary and Romania to change their energy policies regarding Russia, or as retaliation for their stance on aid to Ukraine [5] - Both affected companies, LukOil in Romania and MOL in Hungary, have announced investigations into the incidents, but the timeline for revealing the findings remains uncertain [5]