ED officials said the premises covered under the action include properties and offices belonging to Bhujbal, son Pankaj, ex-MP nephew Samir and few others.
A team of 20 officers of the Mumbai zonal unit of the agency is conducting the operation, they said.
The officials said the investigating officer of the case is also recording the statement of Samir at the ED office here after he was summoned for questioning sometime back.
The agency has filed two FIRs against the Bhujbals and others under the provisions of the Prevention of Money Laundering Act (PMLA), based on earlier filed Mumbai police FIRs, to probe the Delhi-based Maharashtra Sadan construction scam and the Kalina land grabbing case.
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The agency has also brought out three property attachment orders worth over Rs 280 crore in this probe case under money laundering laws.
Minister of State for Finance Jayant Sinha, in a written reply in Lok Sabha on December 18, had said a case has been registered by the ED against Bhujbal, his family members including MLA son Pankaj, ex-MP nephew Samir, a firm called Ms K S Chamankar Enterprises and others.
"Investigation conducted so far has revealed that the entities which have subscribed to the companies controlled by Bhujbals were dubious companies which existed only on paper and their transactions are not genuine transactions," he had said.
The Mumbai police complaint names Pankaj and Samir and they had been booked under IPC Sections related to cheating, criminal conspiracy, criminal breach of trust and relevant provisions of Maharashtra Ownership Flats Act.