"For the part of the national security apparatus that I oversaw as DNI, there was no such wiretap activity mounted against the president-elect at the time or as a candidate or against his campaign," James Clapper, who was Director of National Intelligence during the Obama Administration, told NBC News.
"I can't speak for other title 3-authorised entities in the government or a state or local entity," he said.
In this capacity, Clapper oversaw the working of top American intelligence agencies including the CIA.
Clapper said he would have known had there been any court order on Foreign Intelligence Surveillance Act against Trump.
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"I would know this (FISA court order)... Not to my knowledge," he said when asked if he was aware of any such order either against Trump or against the Trump Tower.
Clapper said till the time he was heading DNI there was no evidence of collusion between the Trump Campaign and the Russian authorities.
"I do think, though, it is in everyone's interest, in the current president's interests, in the Democrat's interests, in the Republican interests and the country's interest to get to the bottom of all of this, because it's such a distraction.
Before leaving the administration, Clapper headed a team that released a report on the alleged Russian interference into the general elections.
"It (investigation) got to the bottom of the evidence to the extent of the evidence we had at the time. Whether there's more evidence that's become available since then or there are ongoing investigations will be revelatory, I don't know," he said in response to a question.
Terming the reports of wiretapping "very troubling", the White House yesterday said that Trump has asked Congress to investigate the allegations of him being wiretapped by his predecessor Barack Obama before the 2016 elections.