Opposition parties today staged a walkout from the Lok Sabha in protest against the recent hike in fuel and cooking gas prices. Members of Congress, Trinamool Congress, DMK, NCP and Left parties raised slogans against the move and walked out of the lower house demanding a rollback. They had tried to raise the issue as soon as Lok Sabha met for Question Hour, but were disallowed by Speaker Om Birla who asked them to raise it after the Question Hour.