Centre for Policy Research (CPR), which was raided by the Income Tax department said in a statement that it has not been involved in any malpractice and "holds itself to the "highest standards of compliance", reports ndtv.com.

"We have extended full cooperation to the department during the survey and will continue to do so in the future," said CPR's president and Chief Executive, Yamini Aiyar, in a statement.

"We hold ourselves to the highest standards of compliance and are confident that we have done nothing wrong. We are committed to working with the authorities to address any questions they might have. We remain committed to our mission to provide rigorous research to policy making in India," Aiyar added.

The operation was unleashed at the premises of NGOs including Oxfam India apart from a media foundation as part of a probe related to alleged FCRA contravention in funds received by them.

The taxman undertook the surprise action against three more organisations in the non-governmental organisation (NGO) and charitable organisation domain, they said.

Sources said the department is looking at the balance sheets of these organisations vis-a-vis the receipt of funds via the FCRA.

According to law, all NGOs receiving foreign funds have to be registered under the FCRA. The government has cancelled FCRA registration of nearly 1,900 NGOs for violating various provisions of law in the last five years. There were 22,762 FCRA-registered organisations till December-end 2021.

In Congress-ruled Rajasthan, the sleuths conducted searches at the premises of Rajasthan Minister of State for Home Rajendra Yadav and his family members.

Income tax department sources said the searches are being conducted as part of a tax evasion investigation.