The bipartisan leadership of the Senate Intelligence Committee said there is no evidence Trump Tower was surveilled by the U.S. government, either before or after the election.

"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," intelligence committee Chairman Richard Burr, R-N.C., and Sen. Mark Warner, D-Va., the panel's top Democrat, said in a statement.

Trump tweeted earlier this month that he believes he was wiretapped by Obama before the election. He has repeated that claim and said in a Fox interview Wednesday that "interesting things" would be forthcoming about the Obama administration's surveillance of his political campaign. But he said it may not be wiretapping, specifically.

The Senate panel is investigating Russia's interference in the U.S. election process, including whether Russian officials had any ties to the Trump campaign. So far no such ties have been found, according to Intelligence panel lawmakers in the House.