Bulgarian authorities said Sunday they had found the bodies of three suspects wanted in a triple murder linked to an allegedly shady NGO that one prosecutor said was like something out of a cult TV series. “Twin Peaks”.

The trio — two men and a 15-year-old boy — were found dead of gunshot wounds in a camping van near Mount Okolchitsa, a peak in the western part of the Balkan Mountains, on Sunday, national police chief Zahari Vaskov told a news conference.

Their bodies were discovered some 50 miles from the burned-out mountain home where the triple homicide was discovered a week ago, on February 2. An ambulance was sent by a shepherd who noticed a person who appeared to be dead behind the wheel, Sofia News Agency reports reported.

The three men killed in the hut — also by gunshots — all belonged to an NGO called the National Agency for the Control of Protected Areas (NAKZT).

Vaskov said the triple murder and the three bodies found Sunday in a trailer — which also belonged to NAKZT — represented an “unprecedented crime, at least for Bulgaria.”

“Whether it’s murder or suicide – we’re following all possible scenarios,” he said, according to reports Bulgarian news agency .

He said the shootings appeared to have occurred inside the van and that investigators were looking into “all possible hypotheses.”

NAKZT presents itself as a mountain guard operation that also organizes youth camps.

But two years ago she was accused in a criminal complaint of allegedly “sexually abusing children” and was found to be in possession of a “paramilitary” device, the interim head of Bulgaria’s State National Security Agency, Denyo Denev, said on Wednesday.

Bulgaria’s acting chief prosecutor, Borislav Sarafov, said at a press conference on Wednesday that NAKZT is believed to be engaged in activities that are not “in line with God’s will or the interests of society, country and children”.

He evoked the case’s similarity to “Twin Peaks,” the American TV show about an FBI agent who makes bizarre and gruesome discoveries in a fictional town while investigating a murder. The revolutionary director of the series, David Lynch, died last year.