MIAMI (CBS4) – A site used for animal sacrifices has been discovered tucked away in an unincorporated section of Miami-Dade northwest of Hialeah police.

Animal activist Richard Couto said he was tipped off to the site located near 107th Avenue and NW 170th Street.

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“Wow, this is a really creepy site,” said Couto as he looked around. Inside a container with animals bones, police also found a human skull and what looked like human bones.

Couto believes the site was used for a Palo Mayombe sacrifice. He said the practice is similar to Santeria, but it is very dark and the sacrifice is made to cast evil spells.

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“A lot of what you see here is not rust, it’s blood,” Couto told CBS4’s Cynthia Demos as they walked around the site.

The remains of dogs, cats, goats were found in containers or on the ground. Couto believes they were killed in the last four weeks. The human skull and what are believed to be human bones were turned over to the Medical Examiner’s Office for confirmation.

Police said the bones and skull looked old and most likely did not come for a human sacrifice. Instead, they believe they may have come from a grave that robbed nearby not to long ago.

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Cuoto says Palo Mayombe is becoming more popular in South Florida. This is the first site of its kind found in South Florida in 15 years.