Dogs seen nibbling on human body parts at possible clandestine burial site in Mexico

After dogs were seen nibbling at human body parts, activists in western Mexico demanded Friday that authorities keep digging at what appears to be a clandestine burial site.

A group representing families of some of Mexico's more than 112,000 missing people said they were concerned police would leave the site on the outskirts of the city of Guadalajara due to a long holiday weekend.

The site had already been disturbed by dogs, and there were fears more evidence could be lost.