Monterrey, in the northern state of Nuevo Leon, is a major Mexican industrial center.
In one bloody 24-hour period in the industrial city of Monterrey, Mexico, drug-related violence claimed the lives of 33 people, most of whom were allegedly connected to local cartels, according to Mexican authorities. —KA
But two of the victims were identified as bodyguards of the governor of Nuevo Leon, Rodrigo Medina.
Police said a threatening message addressed to Mr Medina had been found next to the bodies.
Mr Medina said the threats would not stop his determination to beat organised crime.