Nagarkurnool, March 2 -- In a breakthrough in the tunnel collapse rescue operation in Telangana that has been going on for a week, the location of four of the total eight persons trapped has been located, state excise minister Jupally Krishna Rao said on Saturday. Krishna Rao, who attended a meeting with officials involved in the rescue operation along with irrigation minister N Uttam Kumar Reddy, said there was lot of progress during the last couple of days. "In my view, the whereabouts of four persons have been located through radar," he told reporters at tunnel. He expressed hope they would be extricated by Sunday evening. The other four appear to have been stuck beneath TBM, he said. Asked about the condition of the four whose whereabouts have been found, the minister recalled he had said on the first day itself that the chances of survival are remote. P4...