A heated debate in Mexico's senate comes to blows over alleged opposition calls for U.S. military intervention against drug cartels.

A brawl was seen taking place between Alejandro Moreno, national leader of the Institutional Revolutionary Party (PRI), and Mexican senator Gerardo Fernandez Norona. The opposition denies the claims. Norona says he will file a complaint against Moreno for bodily harm and request his legislative immunity be revoked.