A media report has claimed that high power listening devices were found in the bed room at the 13 Teen Murti Lane residence of Gadkari, the road, transport and highways minister.
It said the discovery was accidental and a debugging exercise was immediately ordered.
"Reports in a section of the media about listening devices having been found at my New Delhi residence are highlyspeculative," Gadkari said on his Twitter account.
Sources close to the Union minister also denied that any such devices were recovered, which, the report said, were of high-quality and of a type normally used by western agencies.
Giving a different version, senior BJP leader Subramanian Swamy said since Gadkari has been a very important leader and had the confidence of RSS, he might have been targeted by the UPA regime.
Congress spokesperson Randeep Singh Surjewala said, "If reports of bugging of senior Cabinet minister Nitin Gadkari, who is also a former BJP president, are correct, they are indeed extremely serious."
It reflects a certain lack of faith amongst ministerial colleagues and an absence of mutual trust. It's time that both Gadkari and also BJP and government come clean on the issue and place before the people of the country if at all there was bugging and if there was snooping being done... At whose instance and at whose authority it has been done. And what is the reason, if any, for conducting such snooping. All these issues need to be clarified both by BJP as well as the PM and the home minister in the larger interest of people."
Swamy said, "My own investigations and my sources reveal that this may have happenned not later than October last year. The planting of the device and that means at that time, when the UPA was in power, the NSA has specifically targeted the BJP and Gadkari was a very important person. He had the confidence of the RSS."