Mexican authorities are investigating after six human heads were located near the border between two states in the country this week.

The Tlaxcala State Attorney General's Office, the agency investigating the case, announced the discovery on Aug. 19 in a news release.

The severed heads were discovered on a road between the Mexican states of Puebla and Tlaxcala. The area is east of Mexico City in the country's central region.

According to the release, police officers and experts with the Institute of Forensic Sciences responded to the scene to investigate the deaths, which involved all males. The victims' ages and where they lived were not provided.

Prosecutors did not share the date or exact location where the remains were discovered but said, "It should be noted that the location corresponds to the discovery, not the actual incident."