Mexico’s Senate ended its summer recess on a violent note Wednesday when opposition leader Alejandro “Alito” Moreno pushed and swung at Senate president Gerardo Fernández Noroña on the chamber floor, an altercation broadcast live by the Canal del Congreso. Video shows the PRI chief grabbing Noroña’s arm moments after lawmakers finished singing the national anthem to close the final meeting of the Comisión Permanente; the confrontation escalated into shoving and punches, knocking down photographer Emiliano González, who later displayed injuries to his arm and neck. Noroña, a senior figure in the ruling Morena party, told reporters he was struck on the shoulder and head and that Moreno threatened to kill him after being denied a last-minute speech. He said he will file criminal complaints against Moreno and three PRI colleagues and will ask the Fiscalía General de la República to seek their desafuero, stripping them of parliamentary immunity. An extraordinary session has been slated for Friday to address the incident. Moreno rejected the accusations, insisting that Noroña initiated the clash and that the ruling bloc violated an agreement to allow final statements. The melee followed hours of partisan debate over calls by some opposition members for U.S. military assistance against drug cartels. The episode, among the most violent in recent congressional memory, underlines the deepening acrimony between the governing coalition and the PRI ahead of the September opening of the regular legislative term.