Seven police officers and four alleged gunmen have been killed in a shootout in north-western Mexico. Officials said the officers were ambushed by a group of gunmen on a road in Sinaloa state. The officers were returning from Choix, a town which has seen a steep rise in violence, including the murder of the police chief last month.
Sinaloa is the stronghold of the drugs cartel of the same name, one of the most powerful in the country. The attack came three days after Sinaloa Governor Mario Lopez Valdez announced that federal police forces would take over security duties in Choix.
Mr Lopez Valdez said that after Municipal Police Chief Hector Echaverria Islas was shot dead on 29 June, no-one from the municipal force had been willing to replace him. Local officials recommended that residents avoid going out after nightfall and take refuge in their homes "to avoid being hit by a bullet".