KATHMANDU: The spectre of yet another tit-for-tat war between two powerful gangs loomed large over Nepal after a man called up a private television station in Kathmandu on Monday and claimed responsibility for the gunning down of controversial media tycoon 24 hours earlier. Avenues Television said it received a call from a man who identified himself as Bharat Nepali, once the trusted lieutenant of gangster Chhota Rajan but now leading a gang of his own, and said he had caused the killing of Jamim Shah, the 47-year-old head of Space Time Network whose Channel Nepal cable television agency had triggered the Hrithi Roshan riots in 2000.