Russian drone strike hits Ukrainian SBU HQ ahead of US peace talks; Zelensky vows response

A Russian drone strike targeted the headquarters of Ukraine's SBU security service, an action Zelensky has called for a 'tangible response' to. The strike occurs as US-mediated peace talks are imminent, signaling potential escalation despite diplomatic efforts. The extent of damage and casualties remains unconfirmed, and the impact on negotiations is uncertain.