A team of 40-odd agency officers arrived at his residence a day after the Central Bureau of Investigation (CBI) claimed that the IPS officer had been "absconding" and "being looked for".
The Rose Valley scam is worth over Rs 15,000 crore and Saradha scam is about Rs 2500 crore. In both cases, the perpetrators allegedly have links with the members of the ruling Trinamool Congress in West Bengal, officials said.
Senior Trinamool Congress leader Derek O'Brien tweeted, asking if BJP was planning a coup by sending 40 CBI officers to the home of the police commissioner.
Earlier on Sunday, CM Mamata Banerjee had described Kumar as the best police officer
in the country. Slamming the BJP for "worst kind of political vendetta", Banerjee said the Kolkata police chief is among the best in the world and was not absconding as claimed by the CBI. "He is working 24x7, and was on leave for only one day recently. When you spread lies, the lies will always remain lies," she tweeted.
The tense situation poses the first immediate challenge for new CBI chief Rishi Kumar Shukla, who has previously served as the Madhya Pradesh police chief.
It is also the first big confrontation between the Bengal CM and the Centre after the state government followed Andhra Pradesh in withdrawing general consent accorded to the CBI to conduct probe and raids in the state.
The general consent, accorded to the CBI by the then Left Front government in 1989, enabled the central agency to conduct any investigation without taking separate permission from the state government.
Following the withdrawal of general consent in November last year, the CBI is required to obtain permission from the West Bengal government to carry out any sort of investigation except those ordered by the courts. The CBI functions under the Delhi Special Police Establishment Act.
Banerjee had late last month described the CBI as "an ally" of the BJP-led central government, alleging that the Centre was using the agency to harass the opposition parties throughout the country.