Talking to reporters at the 'meet-the-press' programme at the press club here, he said allegations had been levelled against finance minister K M Mani and three other ministers in the bar bribery scam.
To press their demand, the LDF had already decided to jointly stage protests in front of district collectorates in the state from April 5 to 9, Rajendran said.
The just concluded national convention of left parties has decided on a joint action against the economic policies of the BJP-led NDA government at the centre, he said.