In an open letter to the chief minister, BJP state president Kummanam Rajasekharan said Vijayan was an administrator who "failed to ensure" a free environment for his political rivals to function.
He claimed that the success of the BJP's recently- concluded 'Jan Raksha Yatra' had "frustrated" the chief minister and his party, the CPI(M), and that was why they were spreading "half truths" and levelling "baseless charges".
"Your (Vijayan's) claim that BJP leaders are running away from debate on development is wrong. You also know that what is needed for such a debate is a peaceful environment," Rajasekharan said in the letter.
"It is meaningless for you to talk about development as you are an administrator who failed to ensure an environ for political rivals to function freely. Only a very cunning person can invite his rivals for peace talks while hiding a knife behind (to attack)," he alleged.
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Rajasekharan also asked Vijayan to explain in which sector the state had made progress when the CPI(M)-led LDF and the Congress-led UDF ruled the state.
He said the two fronts have been in power alternatively for the last several years.
Rajasekharan alleged that at least five BJP workers were killed in the state by the activists of the ruling CPI(M) after peace talks were initiated by the government earlier this year.
In yesterday's Facebook post Vijayan had alleged that the 15-day long 'Jan Raksha Yatra' had propagated "lies and false messages".