Case is shrouded in fevered speculation as prosecutors say autopsies show two of the deceased were “probably” murdered

It has been dubbed Bulgaria’s “Twin Peaks”: a grim saga involving the mysterious deaths of six people in the middle of the mountains that has gripped the eastern European country.

Zahari Vaskov, the director of the national police general directorate, told a press conference on Monday that the deaths were “a case without comparison in our country”.