Senate intelligence committee leaders: 'No indications' Trump Tower was subject of wiretapping before or after 2016 election

The Senate Select Committee on Intelligence weighed in Thursday on President Donald Trump's claims that he was the subject of wiretapping by former President Barack Obama -- finding "no indications" that Trump Tower was the subject of surveillance.

Committee Chairman Sen. Richard Burr and Vice Chairman Sen. Mark Warner refuted the president's claims in a joint statement.

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"Based on the information available to us, we see no indications that Trump Tower was the subject of surveillance by any element of the United States government either before or after Election Day 2016," the statement read.

Earlier this month the president took to Twitter to unleash a series of tweets, accusing Obama of tapping his phones during last year's election without providing any evidence.

The top Republican in Congress, House of Representatives Speaker Paul Ryan, on Thursday added his voice to those rejecting Trump's contention.

"The point is, the intelligence committees in their continuing, widening, ongoing investigation of all things Russia, got to the bottom - at least so far - with respect to our intelligence community that - that no such wiretap existed," Ryan told reporters.

On Wednesday, House of Representatives Intelligence Committee Chairman Devin Nunes, a Republican, and top Democrat Adam Schiff told reporters they had seen no evidence that Trump Tower was tapped and said they would ask Federal Bureau of Investigation Director James Comey about the issue during a public hearing on Monday.

Trump appeared to back away from his accusation of wiretapping in a Fox News interview on Wednesday night.

"But wiretap covers a lot of different things. I think you're going to find some very interesting items coming to the forefront over the next two weeks," Trump said.

(Reuters contributed to this report)