A 'Sex Tantra Camp' in the city which offered training in various tantra techniques was cancelled on Friday following opposition from various outfits and a case was filed against its organisers, police said. The three-day course with a fee of Rs 15,000 organized during the Navratri festival had made many right-wing outfits see red.

A case under Indian Penal Code section 292 which deals with the offence of obscenity was registered against Ravi Singh, a member of the Satyam Shivam Sundaram Foundation which had allegedly organized it, said an official.