The CBI, probing the multi-crore-rupee Saradha scam, has sent notice to a bank seeking account details of the Trinamool Congress maintained by it.
The notice was sent to a city-based branch of a nationalised bank seeking information about the account of the Trinamool.
West Bengal's ruling party in April had furnished details of its income and expenditure after the Central Bureau of Investigation (CBI) sent notice seeking details of the party's accounts since 2010.
Investigating the Saradha scam, the CBI has interrogated and arrested several Trinamool leaders, including state Transport and Sports Minister Madan Mitra.
Asserting that it had nothing to hide, the Trinamool, without naming the BJP, lashed out at the party in power at the centre.
"Harassment continues. Lots of pesky questions on Trinamool's accounts," said party spokesperson Derek O'Brien.
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"Big parties and leaders amass billions, little guys get the questions. Before questioning us, question yourselves and your daylight dacoity to fund your multi-billion dollar election campaign. Trinamool accounts are transparent, nothing to hide," the Rajya Sabha member said.
Leader of Opposition in the assembly Surjya Kanta Mishra, meanwhile, accused the Trinamool of coming to power using 'loot money'.
"From media reports, it is evident how the Trinamool has been getting money. Their income has increased manifold. The ruling party and its members have come to power using this money that has been looted," said Mishra, state secretary of the Communist Party of India-Marxist.