Ukraine launched a significant drone attack on Russia Thursday, targeting a Moscow oil refinery for the second time this week. Russian officials reported disruptions to commercial flights at Moscow airports as a result of the assault, which they described as one of the largest drone waves since the start of the invasion. The attack specifically hit the same oil refinery previously targeted, indicating a focused strategy. While the extent of damage remains unclear, the strikes demonstrate Ukraine’s increasing ability to reach deep inside Russian territory. This latest action escalates tensions as the conflict continues into its fourth year. Russia has not yet officially responded with details regarding casualties or specific defense measures employed.