Party leader and former Bihar Deputy Chief Minister Sushil Kumar Modi, who led a delegation to the EC, accused Yadav of not fully declaring his assets in a poll affidavit filed during the 2015 state assembly polls.
Modi has been making public details of assets allegedly owned by Prasad's family in and outside the state, including in Delhi.
Central enforcement agencies have begun probing the matter.
Modi shared the transaction details with the EC of property that Yadav had allegedly bought in Aurangabad in Bihar in 2010.
Yadav, the health minister in the Nitish Kumar government, did not disclose details of this property in the 2015 affidavit, which was an offence, the BJP leader said.
Modi demanded a case be registered under the relevant sections of the Representation of Peoples Act and the IPC.
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