Three Mexican National Guard members have been shot dead by a colleague at a barracks in the western state of Michoacan, a region recently bolstered by increased security forces following a spate of high-profile killings.
The incident, which also left a fourth service member wounded, was confirmed on Monday by a federal official speaking anonymously to The Associated Press, citing a lack of authorisation to discuss the matter publicly. An investigation into the shooting is now underway.
