Mexican authorities are investigating the discovery of six severed human heads between the states of Puebla and Tlaxcala, according to the Tlaxcala Prosecutor’s Office.

Drivers allegedly discovered six severed heads Tuesday along a road linking the Puebla and Tlaxcala states of Mexico, prosecutors said. Prosecutors confirmed the heads belonged to men and announced an investigation into the crime,

The State Attorney General’s Office will continue the relevant investigations to clarify what happened and hold accountable whoever is found responsible,” the prosecutor’s