A Mexican mayor and his wife were "probable masterminds" behind the disappearance of 43 student teachers last month in the restive southwest, the country's attorney general said on Wednesday.
Mexican police killed three trainee teachers, shot another in the head and another in the face, and herded dozens more into police trucks to what investigators fear was a massacre on a remote hillside, survivors of the incident say.
Mexican President Enrique Peña Nieto vowed on Monday to hunt down those responsible for the apparent massacre of dozens of students in the southwest of the country that authorities say involved local security officials.
Authorities have found mass graves with the charred remains of up to 20 people in the restive southern Mexican state of Guerrero, at a time when police are scouring the area for nearly four dozen missing students after a rash of violence.
