A handwritten message threatening the mayor of Ciudad Valles, San Luis Potosi, caused the mobilization of local, state, and military elements Monday morning.
The discovery of a white cooler with an iced pig head and a message addressed to the mayor, Socorro Herrera Orta, was made around 10:30 am during the city council's weekly flag ceremony.
The message, written on fluorescent poster board, read:
"This is the last message for you to communicate with us Coco, the next time it'll be your family's heads. This goes for all the Golfo supporters....Signed: Unidad Zeta"
Ciudad Valles police have been the target of three attacks in less than a year.
Sources: Codigo San Luis, El Sol de San Luis