Amid Opposition's walkout from an all-party meeting before Parliament's Monsoon Session, Congress MP Jairam Ramesh criticised BJP-led Centre. "NCPI is currently serving as parking spot for 20 'rebel' MPs from TMC," Ramesh said, adding that walkout was "in protest" against Centre's invitation to NCPI. Lok Sabha Speaker Om Birla is yet to recognise merger of 20 TMC MPs with NCPI.