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The researchers reviewed historical archives showing that several known sages and healers operated in the Koli area.

An audio-visual virtual reality reconstruction of the Devil's Church in Koli is currently underway for research and demonstration purposes.

The national park of Koli in eastern Finland is home to a famous, 34-metre-long crevice cave known as Pirunkirkko, or Devil's Church in English.

Police alleged at the time that the murders took place inside Pandher's house, where Koli worked as a servant.

Surinder Koli and his businessman employer Moninder Singh Pandher were convicted in 2009 in a gruesome case that shocked the country.