In the Mexican state of Sinaloa, authorities have ordered residents not to don masks or costumes on Thursday night for Halloween to avoid being confused with criminals amid a worsening cycle of cartel violence.
Home to the powerful Sinaloa Cartel, the northwestern state has been wracked by deadly infighting between factions of the group following the arrest of one of its leaders, drug trafficker Ismael “El Mayo” Zambada, in the United States in late July.
The intra-cartel warfare...