WASHINGTON — President Trump on Sunday morning lashed out at ABC News, two days after investigative reporter Brian Ross made an erroneous report involving the president.

Ross had incorrectly reported Friday that during the presidential campaign, Trump directed Michael Flynn to make contact with Russian officials before the election.

Later that night, Ross read a “clarification” on “ABC World News Tonight,” saying Trump had actually asked Flynn to make contact with Russia after the election, when he was president-elect.

Flynn, who briefly served as Trump’s national security adviser after the election, pleaded guilty Friday to lying to the FBI.

ABC News apologized for the mistake Saturday and issued a full correction. The network also suspended Ross for four weeks without pay, effective immediately.

On Twitter Saturday night, Trump initially offered his “congratulations” to ABC News for “suspending Ross for his horrendously inaccurate and dishonest report on the Russia, Russia, Russia Witch Hunt.”

The network broke Ross’ report Friday with a tweet that read: “JUST IN: @BrianRoss on @ABC News Special Report: Michael Flynn promised ‘full cooperation to the Mueller team’ and is prepared to testify that as a candidate, Donald Trump ‘directed him to make contact with the Russians.’ ”

The tweet, which has since been deleted, included a link to a story and a photo. It was shared and liked tens of thousands of times before it was removed.

Later Friday night, ABC then issued a “clarification,” in the form of a new tweet and Ross’ on-air appearance on “World News Tonight” with host David Muir. The subsequent tweet, which has also since been deleted, read: “CLARIFICATION of ABC News Special Report: Flynn prepared to testify that President-elect Donald Trump directed him to make contact with the Russians during the transition – initially as a way to work together to fight ISIS in Syria, confidant now says.”

ABC News was widely panned, even by those in the media industry, for its bungled handling of Ross’ error. Former White House press secretary Sean Spicer called the network’s “clarification” a “cop-out and just another reason for the decline in trust of the media.”

Several lamented that ABC had given ammunition to those who have long accused the mainstream media of being “fake news.”

It wasn’t until late Saturday afternoon that ABC issued a full correction and characterized Ross’ mistake as a “serious error.”

“We deeply regret and apologize for the serious error we made yesterday. The reporting conveyed by Brian Ross during the special report had not been fully vetted through our editorial standards process,” ABC News said in a statement. “As a result of our continued reporting over the next several hours ultimately we determined the information was wrong and we corrected the mistake on air and online.”

The statement continued: “It is vital we get the story right and retain the trust we have built with our audience – these are our core principles. We fell far short of that yesterday.”

Ross said he accepted the disciplinary action.

“My job is to hold people accountable and that’s why I agree with being held accountable myself,” he tweeted Saturday.

Ross has worked for ABC News since 1994.

He has racked up several notable corrections in his career. In 2012, following a mass shooting at a movie theater in Aurora, Colorado, Ross incorrectly reported that the suspect was a local tea party leader with the same name as the actual shooter. He later retracted the report.

In 2001, Ross erroneously linked anthrax used in attacks in Washington and New York with Iraq and its leader, Saddam Hussein.