Watch: BBC on streets of Mexican city gripped by deadly cartel violence

BBC international correspondent Quentin Sommerville travelled to Culiacán in northern Sinaloa state following an explosion in violence.

​Watch: BBC on streets of Mexican city gripped by deadly cartel violence BBC international correspondent Quentin Sommerville travelled to Culiacán in northern Sinaloa state following an explosion in violence. BBC international correspondent Quentin Sommerville travelled to Culiacán in northern Sinaloa state following an explosion in violence.