Description:Anxious relatives await news outside a prison facility in the northern Mexican city of Monterrey Sunday after a riot erupted between inmates, leaving dozens dead. Some try to break down entry gates, desperate to know their loved ones' fate. Authorities say at least 44 people died after fights broke out in the early morning. Powerful drug cartels are fighting for control of smuggling routes along the U.S.-Mexico border and rivalries often spread into the prison system.(1:23)