CJNG fighters attacked the Municipal Presidential building in Jiquilpan, Michoacán, in the past 29 minutes through 11:45 PM UTC on February 23, 2026, as captured in a video shared by All_Source_News on X. The assault occurred amid ongoing cartel violence following the death of leader Nemesio Oseguera Cervantes, El Mencho. The U.S. Embassy in Mexico issued Security Alert Update 5 during this reporting window, urging U.S. citizens in Jalisco (including Puerto Vallarta, Chapala, and Guadalajara) and Nayarit (including Nuevo Nayarit/Nuevo Vallarta) to shelter in place due to road blockades and criminal activity tied to security operations on February 22, according to the embassy's official X post. U.S. government personnel in Guadalajara, Puerto Vallarta, and Ciudad Guzmán remain sheltered until blockades clear. Update 5 notes the situation has normalized in areas including Baja California, Quintana Roo, Colima, and others as of February 22 incidents, while APHIS offices in Michoacán continue remote work. All Mexican airports operate normally except potential disruptions in Guadalajara and Puerto Vallarta, with travelers advised to check airlines. This Jiquilpan attack builds on CJNG drone strikes on Mexican forces and the Mexican Navy ship Usumacinta's arrival in Puerto Vallarta reported through 11:15 PM UTC, per prior X posts by war_noir and AtamvirMultani. Mexican officials, including President Claudia Sheinbaum, confirmed El Mencho's death in a Tapalpa raid earlier on February 23 with U.S. intelligence support.