The party also warned extremist right wing forces that they cannot succeed through such actions and vowed to carry forward the struggle of Pansare, who was leading an anti-road toll agitation.
"Despite widespread condemnation, the Maharashtra government failed to arrest the killers so far suspected to be communal and reactionary elements. It shows utter inaction of the state government.
"The party demands that the Maharashtra government must show its will to chase the criminals and arrest them who carried such a dastardly attack on a senior communist leader of the country.
Pansare was shot at along with his wife by unknown assailants in Kolhapur on February 16 while they were taking a morning walk. The veteran CPI leader succumbed to bullet injuries at a Mumbai hospital late last night.
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The mortal remains of Pansare were flown to Kolhapur in a chartered flight for the last rites.
The party said that it would carry on the struggle for which Pansare laid down his life and also appealed to all state units to organise befitting mass meetings in his honour and take up the unfinished tasks he had left.