Robots on Tuesday joined the operation to locate the seven persons who remain trapped inside the partially collapsed SLBC tunnel here since February 22. The team of a Hyderabad-based robotics company along with a robot went inside the tunnel Tuesday morning. 110 rescue personnel also went into the tunnel. The Telangana government has decided to deploy robots to avoid any danger to the rescue personnel as the conditions inside the tunnel, including water and slush, posed a challenge. State irrigation minister N Uttam Kumar Reddy on March 8 said the government would spend Rs four crores to undertake the operation by utilizing the services of robot experts (of the Hyderabad-based private company). Fragments of the huge Tunnel Boring Machine (TBM) got submerged under water, soil and stones inside the tunnel caused hazard to the rescue team, he had said. Chief Minister A Revanth Reddy, who visited the tunnel on March 2, suggested to the officials leading the operation to use robots ins