As North Korea ramped up its nuclear program, building missiles that most experts agree could hit the continental United States, U.S. President Donald Trump told officials that Russian leader Vladimir Putin had reassured him that Pyongyang did not possess such weapons — a claim Trump believed, according to the fired former acting FBI chief.

Andrew McCabe related the account in an interview aired Sunday on the CBS program "60 Minutes," saying that Trump's comments came despite being told by U.S. intelligence officials that the North did, in fact, possess such missiles.

The remarks also came as the investigation into Trump's alleged ties to Russia gained steam, with the president launching into "several unrelated diatribes."