The Senate of Mexico was the scene of violence after the opposition leader, Alejandro Moreno, assaulted the president of the chamber, Gerardo Fernández Noroña, during the national anthem.

The incident occurred at the end of a meeting, when Alejandro Moreno, the leader of the Institutional Revolutionary Party, angrily approached the podium, accusing Noroña of not giving him the floor. A physical confrontation broke out between the two, with punches and shoving. Tensions escalated following mutual accusations related to Mexican cartels and the government's involvement in illegal activities. This incident was amplified by statements from a conservative senator about the infiltration of cartels into the government.