Key events from the Ukraine war on Friday, September 4, 2026, indicate a potential escalation in conflict. Russia launched strikes against the headquarters of Ukraine’s Security Service (SBU). Ukrainian Foreign Minister Andrii Sybiha has condemned the attacks as a “massive escalation,” marking the 1,653rd day of the war. Sybiha asserts the strikes reveal Russia’s genuine stance towards diplomatic solutions. The attack on the SBU headquarters represents a significant development in the ongoing hostilities. This action raises concerns about further intensification of the conflict and the prospects for peace negotiations. It demonstrates a continued disregard for civilian and governmental infrastructure.