Saudi Arabia stated its national security is a red line, issuing a 24-hour ultimatum for UAE forces to leave Yemen following a coalition airstrike on Mukalla. Yemen's presidential council head accused the UAE of fueling internal strife and directing separatists against state authority. The move escalates tensions between the two Gulf nations, which are allies in the coalition fighting Houthi rebels. The coalition cited the unauthorized arrival of UAE vessels carrying weapons as a precursor to the strike.