Investigators in Mexico have wrapped up their search for bodies at a suspect drug gang dumping site where 51 corpses have been found over the past few days.

The attorney general of Nuevo Leon state, where Monterrey is located, said the victims included 48 men and 3 women.

There were so many bodies that authorities had to use refrigerated trucks to hold them.

Investigators are still trying to identify the remain, and suspect drug traffickers are involved.

Authorities say the majority of the bodies had tattoos of different types that could give an indication about whether they belonged to a certain drug gang, or if they were linked to organized crime.

A state government spokesman says the bodies have been found whole, or in parts, with some buried in pits and others near the surface.

Mexico's drug cartels have been known to use corrosive liquids, fire, quicklime and other methods to dispose of their victims or make identification of their bodies difficult.

Nearly 25-thousand people have been killed in drug violence in Mexico since 2008, when the government launched a war on drugs and related violence.