Union minister Nirmala Sitharaman also rejected the CPI(M)'s claim that it had nothing to do with the incident and said there should be an impartial probe into the attacks on saffron activists as these have steadily risen since the Left alliance came to power in May this year.
She told a press conference that CPI(M) workers were running the police stations in the state and no case was registered and action taken on complaints of BJP and RSS workers while they were being booked in false cases.
"We suspect this attack was an attack on our president... Not even one accused has been rounded up in cases of attacks on the RSS workers," she said.
The incident occurred last night shortly after the BJP state president had left the office for Kozhikode where preparations were on for the party's three-day National Council meeting from September 23.
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"The state government is indirectly supporting the attacks. CPI(M) workers would act as if they are running the government. Action (by police) depends only on the basis of political affiliations," she said.
Sitharaman said it was "shocking" the attacks were continuing even after a BJP delegation had met President Pranab Mukherjee in this regard.
Asked about Congress Vice President Rahul Gandhi's attack on Prime Minister Narendra Modi and BJP during his campaign in Uttar Pradesh, she said he can say a lot of things due to the Assembly polls in the state but his party was not coming back to power there.