More than 30 dead cats were discovered decomposing inside plastic bags that were hanging from trees in an abandoned lot in Yonkers on Thursday, a report said.

The macabre display was discovered at around 10 a.m. when workers arrived at the location to clean up the lot, according to the website Vocativ.

The dead cats were strewn all over the trees as if they had been part of a twisted ritual.

“They were placed in small shopping bags, the plastic bags that you might get from an A&P or a ShopRite, and then they were hung from a tree,” Ernie Lungaro, director of humane law enforcement at the SPCA of Westchester, told the site.

The animals had been there a while. Some of the cat carcasses were severely decomposed, Lungaro said.

The SPCA said that they would perform necropsies on the animals. Local police were investigating the incident to try to determine who killed the cats.