Statesman News Service KOLKATA/SILIGURI/RAIGANJ, Jan.19: Chief minister Mr Buddhadeb Bhattacharjee has invited the leader of the Gorkha Jana Mukti Morcha (GJMM), Mr Bimal Gurung, to talks even as the state government expressed apprehension about “ethnic clash†in the Dooars “We must avoid ethnic clash at all costs, otherwise what is the purpose of long-standing talks,†said home secretary Mr …