BJP on Tuesday brought four National People's Party (NPP) ministers who resigned from the N Biren Singh-led Manipur government to Delhi for a meeting with central leaders to salvage the crisis in the north eastern state, BJP sources said. During a fresh round of talks with NEDA convenor Himanta Biswa Sarma in Imphal earlier in the day, the NPP politicians stuck to their demands of change in the leadership of the BJP-led coalition government in the state, said sources. Sarma, BJP’s key troubleshooter in the Northeast, accom- panied the four to Delhi in a special aircraft, they said.