"Law will take its own course," he said when asked by reporters here to comment on the land deals involving the company of Congress President Sonia Gandhi's businessman son-in-law.
Asked about other alleged land scams during the previous Congress government in the state, Khattar maintained that the law will take its own course.
A draft CAG report is believed to have found that Vadra had reaped nearly Rs 44 crore in windfall gains in land deals in Haryana during the Bhupinder Singh Hooda regime.
Khattar was speaking to reporters after his Minister, Bikram Singh Yadav, assumed charge at the Haryana Civil Secretariat here.
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Asked to comment on Vadra reportedly losing his cool and pushing the microphone of a reporter in Delhi when questioned about land deals involving his company, Haryana's Health Minister Anil Vij told reporters in Ambala that "one only reacts in such a manner and shows anger when one has something to hide".
Vij said the media was just doing its job as it is its responsibility to ask questions and dig out facts.
BJP had alleged irregularities in the land deals involving Vadra and had raked up the issue during campaign in the 2014 Lok Sabha and before last month's Assembly polls to attack Congress.
Replying to questions, Khattar said the BJP government will strive to give a clean and transparent administration to the people, besides curbing corruption with "an iron hand".
After taking oath on October 26, Vij and another state minister Capt Abhimanyu had said the new regime will order a thorough probe into the alleged land scams and spare none even if it was Vadra or Hooda.