Police investigating drug gangs in Mexico have discovered 51 corpses in a field near a rubbish dump.
Investigators said the bodies were found during two days of digging in land outside the northern city of Monterrey.
The body dumping ground is one of the largest discovered in Mexico's bloody drug war and excavations are continuing.
The attorney general of Nuevo Leon state, where Monterrey is located, said the victims included 48 men and three women.
There are so many bodies that authorities are using refrigerated trucks to hold them.
Police said the majority of the bodies had tattoos indicating allegiance to drug gangs.
A state government spokesman said the bodies have been found both whole and in parts, with some buried in pits and others on or near the surface.
The spokesman, who was not authorized to be quoted by name, said an anonymous phone tip led authorities to the site on Thursday.
Photographs showed charred spots on the ground - suggesting some bodies may have been partially burned.
The largest mass grave found in recent years was discovered in May in the southern city of Taxco, where a total of 55 bodies were dumped in an abandoned mine shaft.
Nearly 25,000 people have been killed in drug violence in Mexico since the government launched an offensive against cartels in late 2006.