WASHINGTON (AP) — President Donald Trump has denied that he was made aware of U.S. intelligence officials’ conclusions that Russia secretly offered bounties to Taliban-linked militants for killing American troops in Afghanistan. The Trump administration was set to brief select members of Congress on the matter on Monday.

The intelligence assessments came amid Trump’s push to withdraw the U.S. from Afghanistan and suggested that Russia was making overtures to militants as the U.S. and the Taliban were holding talks to end the long-running war. The assessment was first reported by The New York Times and then confirmed to The Associated Press by American intelligence officials and two others with knowledge of the matter.

There were conflicting reports about whether Trump was aware of Russia’s actions. The intelligence officials told the AP that the president was briefed on the matter earlier this year; Trump denied that, tweeting on Sunday that neither he nor Vice President Mike Pence had been briefed. The Republican president tweeted Sunday night that he was just told that intelligence officials didn’t report the information to him because they didn’t find it credible.

The intelligence officials and others with knowledge of the matter insisted on anonymity in order to discuss the highly sensitive matter.

The White House National Security Council would not confirm the assessments but said the U.S. receives thousands of intelligence reports daily that are subject to strict scrutiny.

Sen. Lindsey Graham, R-S.C., who golfed with Trump on Sunday, tweeted a day earlier that it is “Imperative Congress get to the bottom of recent media reports that Russian GRU units in Afghanistan have offered to pay the Taliban to kill American soldiers with the goal of pushing America out of the region.”

Rep. Liz Cheney of Wyoming, the No. 3 Republican in the House, called for the White House to share more information with Congress, saying if true, lawmakers need to know “Who did know and when?” and, referring to Russian leader Vladimir Putin, “What has been done in response to protect our forces & hold Putin accountable?”

Democratic presumptive presidential nominee Joe Biden said reports that Trump was aware of the Russian bounties would be a “truly shocking revelation” about the commander in chief and his failure to protect U.S. troops in Afghanistan and stand up to Russia.

Russia called the report “nonsense.”

“This unsophisticated plant clearly illustrates the low intellectual abilities of the propagandists of American intelligence, who instead of inventing something more plausible have to make up this nonsense,” the Russian Foreign Ministry said.

A Taliban spokesman said the militants “strongly reject this allegation” and are not “indebted to the beneficence of any intelligence organ or foreign country.”

John Bolton, a former national security adviser who was forced out by Trump last September and has now written a tell-all book about his time at the White House, said Sunday that “it is pretty remarkable the president’s going out of his way to say he hasn’t heard anything about it. One asks, why would he do something like that?”

Bolton told NBC’s “Meet the Press” that he thinks the answer “may be precisely because active Russian aggression like that against the American service members is a very, very serious matter and nothing’s been done about it, if it’s true, for these past four or five months, so it may look like he was negligent. But, of course, he can disown everything if nobody ever told him about it.”

House Speaker Nancy Pelosi, one of the few congressional leaders briefed on sensitive intelligence matters, told ABC’s “This Week” that she had not been informed about the reported bounties and requested a report to Congress on the matter.

“This is as bad as it gets, and yet the president will not confront the Russians on this score, denies being briefed. Whether he is or not, his administration knows and our allies — some of our allies who work with us in Afghanistan had been briefed and accept this report,” she said.

While Russian meddling in Afghanistan is not a new phenomenon for seasoned U.S. intelligence officials and military commandos, officials said Russian operatives became more aggressive in their desire to contract with the Taliban and members of the Haqqani Network, a militant group that is aligned with the Taliban in Afghanistan and that was designated as a foreign terrorist organization in 2012. Russian operatives are said to have met with Taliban leaders in Doha, Qatar and inside Afghanistan; however, it is unknown if the meetings were to discuss bounties.

The officials the AP spoke to said the intelligence community has been investigating an April 2019 attack on an American convoy that killed three U.S. Marines after a car rigged with explosives detonated near their armored vehicles as they were traveling back to Bagram Airfield, the largest U.S. military installation in Afghanistan. Three other U.S. service members were wounded in the attack, along with an Afghan contractor. The Taliban claimed responsibility for the attack on Twitter. The officials the AP spoke to also said they were looking closely at insider attacks — sometimes called “green-on-blue” incidents — from 2019 to determine if they are also linked to Russian bounties.

In early 2020, members of the elite Naval Special Warfare Development Group, known to the public as SEAL Team Six, raided a Taliban outpost and recovered roughly $500,000. The recovered funds further solidified the suspicions of the American intelligence community that the Russians had offered money to Taliban militants and other linked associations.

One official said the administration discussed several potential responses, but the White House has yet to authorize any step.

Trump responded to Biden on Twitter, saying “Russia ate his and Obama’s lunch during their time in office”

But it was the Obama administration, along with international allies, that suspended Russia from the Group of Eight after its unilateral annexation of Crimea from Ukraine — a move that drew widespread condemnation.

Biden criticized Trump for “his embarrassing campaign of deference and debasing himself” before Putin. Trump tweeted that “nobody’s been tougher” on Russia than his administration.

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Associated Press writer Lynn Berry contributed to this report.