Agency sleuths searched the premises of the firm in south Delhi after its probe found that it was "involved" in purchasing land from companies, who had initially procured land from the border town of Rajasthan.
"It is suspected that the firm acted as a dummy or shell company. Some documents and computer peripherals have been seized. The premises, which were brought under the search operation, belongs to a chartered accountancy firm," sources said.
The agency had not taken the name of Vadra or any company linked to him in its FIR but it had named some state government officials and some of the "land mafia".
"He (Vadra) has done no wrong. No case is pending against him. This is sheer political vendetta," Congress General Secretary and spokesperson Shakeel Ahmed had told reporters after the ED filed its case few months back.
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The central probe agency picked up the case based on 18 FIRs filed by the state police in August last year after the local tehsildar had made a complaint.
He had said in the complaint that the government land in 34 villages of Bikaner, to be used for expanding the army's firing range in the area, was "grabbed" by the land mafia by preparing "forged and fabricated documents" in connivance with government officials.
The state government, while cancelling the mutations, had said that these were not issued by the Commissioner, Colonisation, Bikaner.
The state police has also filed charge sheets in the 18 cases in a court in Kolayat in the middle of this year.