In the past few days, police have discovered dozens of mass graves filled with victims of drug cartels in San Fernando, Mexico.
Police have discovered a total of 177 victims in the graves, most of which were likely killed at the hands of the Zetas cartel, a major and vicious Mexican gang, authorities told the Financial Times.
Most of the victims had blunt force trauma to the head, while a sledgehammer that was found at the crime scene this month was likely used in the executions, Mexican investigators and state officials told the Washington Post.
Over 35,000 people have been killed in the past four years since the government's began it's battle with Mexico's organized crime, which America has supported with $1.6 billion.
Authorities have arrested 76 suspects, including the possible local Zeta boss Martin "El Kilo" Estrada, who authorities have attributed as the mastermind behind the killings.