(CNN) President Donald Trump's former national security adviser did not properly disclose payments from Russia and may have broken the law, House Oversight Chairman Jason Chaffetz and ranking Democrat Elijah Cummings said Tuesday after reviewing Michael Flynn's application for a security clearance.

"As a former military officer, you simply cannot take money from Russia, Turkey or anybody else. And it appears as if he did take that money. It was inappropriate. And there are repercussions for the violation of law," Chaffetz said.

Trump and the first lady welcome guests to the White House Easter Egg Roll on Monday, April 17. The egg-rolling tradition began in the 1870s.

Trump talks to a caddie during a round of golf in West Palm Beach, Florida, on Saturday, April 8. Trump frequently criticized President Obama for playing golf, but he has been a frequent golfer during his first few months in office.

Trump walks away from the lectern after announcing the missile strike in Syria on April 6. "It is in this vital national security of the United States to prevent and deter the spread and use of deadly chemical weapons," Trump said.

In this image provided by the White House, Trump is briefed by his national security team about the missile strike in Syria on April 6. They were at a secured location on Trump's Mar-a-Lago resort.

Trump and Chinese President Xi Jinping are accompanied by first ladies Melania Trump and Peng Liyuan as they talk at the Mar-a-Lago resort in Florida on April 6. During Xi's visit, the trade relationship between China and the United States was at the top of the agenda, as was the rising threat of North Korea's nuclear program.

Trump speaks to the press aboard Air Force One on April 6. The Internet had some fun with the juxtaposition of Trump and "Star Wars" villain Darth Vader, who appeared in the scene on the right from the film "Rogue One."

In pouring rain, the President boards Air Force One for a trip to Florida, where he would meet with Chinese President Xi Jinping on Thursday, April 6.

In pouring rain, the President boards Air Force One for a trip to Florida, where he would meet with Chinese President Xi Jinping on Thursday, April 6.

Trump pauses during a White House news conference on Wednesday, April 5. Trump spoke about the suspected chemical attack in Syria, blaming Syrian President Bashar al-Assad and saying it had "crossed a lot of lines for me." The United States later launched a missile strike against a Syrian government air base.

Vice President Mike Pence, third from left, tries to stop Trump as Trump walks out of an executive order signing ceremony on Friday, March 31. During the signing ceremony, White House pool reporters asked Trump questions about former national security adviser Michael Flynn, who has offered to testify on Russian involvement in the US election. The President ignored the questions and moved to another room to sign the two executive orders, which regarded trade policy.

The President participates in a White House roundtable with women who are small business owners on Monday, March 27.

The President participates in a White House roundtable with women who are small business owners on Monday, March 27.

The President arrives at the US Capitol to meet with House Republicans about a health care bill on Tuesday, March 21. Trump urged GOP lawmakers to vote in favor of the legislation, which would repeal Obamacare. But later in the week, House Speaker Paul Ryan pulled the bill from the floor after it became clear it did not have the votes to pass.

The President pretends to drive a tractor-trailer during a White House event with truckers and truck industry executives on Thursday, March 23.

German Chancellor Angela Merkel, left, speaks with Ivanka Trump during a roundtable discussion at the White House on Friday, March 17. In Merkel's first US visit during the Trump administration, she and the President discussed issues that included NATO, ISIS and the ongoing conflict in Ukraine. Donald Trump repeatedly bashed Merkel on the campaign trail and accused her of "ruining Germany," citing the nation's policies of allowing refugees in. But he said his meeting with the Chancellor was "very good."

Trump, the first lady and their son, Barron, walk to Marine One before leaving the White House on Friday, March 17. Melania and Barron Trump are living in New York until Barron finishes out the school year.

Trump, the first lady and their son, Barron, walk to Marine One before leaving the White House on Friday, March 17. Melania and Barron Trump are living in New York until Barron finishes out the school year.

Trump speaks Monday, March 13, during the first meeting with his Cabinet. Who's who on Trump's Cabinet? See the full list here

Trump moves a drink across the table before a White House discussion about health care on Friday, March 10. The President's habit of moving things caught the eye of CNN's Jeanne Moos, who reported on the unusual quirk.

Trump surprises visitors who were touring the White House on Tuesday, March 7. The tour group, including many young children, cheered and screamed after the President popped out from behind a room divider.

Trump, left, and chief strategist Steve Bannon board Air Force One before returning to Washington on Sunday, March 5. Bannon, one of Trump's earliest cheerleaders in his role leading the ultra-conservative website Breitbart News, joined the Trump campaign in August 2016. According to CNN's Chris Cillizza, he was widely credited with putting skin and muscle on the bare bones of Trump's "America First" worldview.

A strong wind blows Trump's tie as he arrives at Orlando International Airport on March 3. CNN's Jeanne Moos reports on Trump's presidential neckwear: Long ties with Scotch tape on the back

The President and his grandchildren Arabella and Joseph walk across the South Lawn of the White House on Friday, March 3. They were about to board Marine One for a short flight to Andrews Air Force Base.

The President and his grandchildren Arabella and Joseph walk across the South Lawn of the White House on Friday, March 3. They were about to board Marine One for a short flight to Andrews Air Force Base.

Trump applauds Carryn Owens during his speech to a joint session of Congress on Tuesday, February 28. Owens' husband, Navy SEAL William "Ryan" Owens, was killed during a recent mission in Yemen. "Ryan died as he lived: a warrior and a hero, battling against terrorism and securing our nation," Trump said. The applause in the chamber lasted over a minute, which Trump said must be a record.

White House Adviser Kellyanne Conway takes an Oval Office photo of Trump and leaders of historically black colleges and universities on Monday, February 27. The image of her kneeling on the couch sparked memes on social media.

Trump delivers remarks at the Conservative Political Action Conference on Friday, February 24. Speaking to a right-wing crowd of activists that once viewed him skeptically, Trump vowed to uphold his campaign promises. He also escalated his attacks on the press and vowed an economic revival spurred by new jobs and scaled-back regulation.

White House Chief of Staff Reince Priebus, left, listens to Trump as Marine One lands on the South Lawn of the White House on Monday, February 20. Prior to joining the Trump administration, Priebus was chairman of the Republican National Committee.

White House Chief of Staff Reince Priebus, left, listens to Trump as Marine One lands on the South Lawn of the White House on Monday, February 20. Prior to joining the Trump administration, Priebus was chairman of the Republican National Committee.

Trump hugs supporter Gene Huber after he invited Huber to speak on stage during a rally in Melbourne, Florida, on Saturday, February 18. Huber, wearing a black Donald Trump T-shirt, thanked the President and spoke for a few moments.

Trump speaks during a news conference in the East Room of the White House on Thursday, February 16. The President lashed out against the media and what he called fake news as he displayed a sense of anger and grievance rarely vented by a president in public. He said he resented reports that his White House was in chaos. "This administration is running like a fine-tuned machine," he said.

Trump and Abe were dining at Mar-a-Lago on Saturday, February 11, when they got the call that North Korea had launched an intermediate-range ballistic missile. They gathered their teams for an impromptu strategy session that could be seen by other diners at the resort. This photo was posted by a Mar-a-Lago member on Facebook and quickly spread on the Internet.

Trump welcomes Japanese Prime Minister Shinzo Abe outside the West Wing of the White House on Friday, February 10. The two leaders held Oval Office talks and had lunch together in the State Dining Room. The next day, they traveled to Trump's Mar-a-Lago resort and played golf together.

Trump offers his hand to Jeff Sessions, who had just been sworn in as the new attorney general on February 9. Sessions, one of Trump's closest advisers and his earliest supporter in the US Senate, was confirmed by a 52-47 vote that was mostly along party lines. He was accompanied to the swearing-in by his wife, Mary.

Trump meets with members of the US airline industry on Thursday, February 9. Trump said he knows US airlines are "under pressure from a lot of foreign elements and foreign carriers." But he added that "we want to make life good for them also." Foreign carriers buy lots of planes and jet engines from US manufacturers, and that supports thousands of well-paying factory jobs at home. During the meeting, Trump also promised that the United States would invest in transportation infrastructure, improving the nation's airports and air traffic control system.

Trump waves as he boards Air Force One in Tampa, Florida, on Monday, February 6. He met generals and troops during a trip to MacDill Air Force Base, the headquarters of Central Command and Special Operations Command.

Trump listens to a high school marching band as he arrives at the Trump International Golf Club in West Palm Beach, Florida, on Sunday, February 5. The President and first lady attended a Super Bowl party there.

Trump listens to a high school marching band as he arrives at the Trump International Golf Club in West Palm Beach, Florida, on Sunday, February 5. The President and first lady attended a Super Bowl party there.

Trump tosses a Sharpie pen back to a group of supporters after signing autographs in Palm Beach, Florida, on Friday, February 3. Trump was spending the weekend at his Mar-a-Lago resort, which has become a popular trip so far during his presidency.

Trump puts his hand on the shoulder of Secretary of State Rex Tillerson after Tillerson was sworn in on February 1. They are joined by Vice President Pence and Tillerson's wife, Renda St. Clair. Tillerson, a former CEO of ExxonMobil, was confirmed in the Senate by a vote of 56 to 43.

Trump met with several African-American leaders for a listening session to kick off Black History Month on Wednesday, February 1. Trump was seated between Ben Carson, his nominee to head the Department of Housing and Urban Development, and Omarosa Manigault, a former "Apprentice" contestant who is now part of the administration.

Trump speaks in the East Room of the White House as he announces Neil Gorsuch as his Supreme Court nominee on Tuesday, January 31. Gorsuch -- at right with his wife, Louise -- would replace Justice Antonin Scalia, who died last year.

Trump and House Speaker Paul Ryan shake hands in front of Vice President Pence during a luncheon with GOP lawmakers on January 26. Trump previewed an ambitious governing agenda during his speech. "This Congress is going to be the busiest Congress we've had in decades, maybe ever," he said. "This is our chance to achieve great and lasting change for our beloved nation."

Trump sits in front of a jacket that was given to him by the crew of Air Force One on Thursday, January 26. It was his first trip aboard the plane and Marine One.

Trump sits in front of a jacket that was given to him by the crew of Air Force One on Thursday, January 26. It was his first trip aboard the plane and Marine One.

Trump, left, watches Vice President Mike Pence swear in senior White House staff members on January 22. Trump said he and his aides will "face many challenges, but with the faith in each other and the faith in God we will get the job done."

Trump, left, watches Vice President Mike Pence swear in senior White House staff members on January 22. Trump said he and his aides will "face many challenges, but with the faith in each other and the faith in God we will get the job done."

Trump holds up a letter Sunday, January 22, that was left for him by former President Barack Obama. "I just went to the Oval Office and found this beautiful letter from President Obama. It was really very nice of him to do that. And I will cherish that," said Trump, who frequently criticized Obama on the campaign trail. Trump wouldn't tell the press what was in the letter.

Trump kisses the first lady as they dance at one of three inaugural balls on January 20. The former real estate mogul, known for his affinity of over-the-top gold fixtures, went for classic Americana with a touch of retro glitz.

Donald Trump is sworn in as the 45th President of the United States during his inauguration ceremony on Friday, January 20. Trump's wife, Melania, is holding a family Bible and a Bible that belonged to former President Abraham Lincoln. Next to Melania, from left, are Trump's children: Barron, Donald Jr., Ivanka, Tiffany and Eric.

Chaffetz and Cummings announced their findings to reporters on the Hill following a classified gathering of the committee in which they reviewed documents that Cummings described as "extremely troubling."

"I see no data to support the notion that Gen. Flynn complied with the law," Chaffetz said, referring to whether Flynn received permission from the Pentagon or the State Department or that he disclosed the more than $45,000 he was paid for a speech he gave to RT-TV in Russia.

Chaffetz said that the committee will send a letter now requesting information from the inspector general at the Department of Defense and the comptroller of the US Army to determine how they will handle news of Flynn's security clearance. One action, he said, may be seeking repayment of money from Flynn -- possibly in the tens of thousands of dollars.

JUST WATCHED Chaffetz: No evidence Flynn followed the law Replay More Videos ... MUST WATCH Chaffetz: No evidence Flynn followed the law 00:56

Cummings noted that the security clearance states that knowingly leaving off payments from foreign governments is a felony punishable with up to five years in prison. But he and Chaffetz both said that it was not for them to decide whether Flynn committed a crime.

"We're not here to make the final determination," Chaffetz said Tuesday.

Flynn's lawyer, Robert Kelner, said Tuesday that Flynn was not hiding anything, noting that he briefed the Defense Intelligence Agency on his trip to Russia.

"As has previously been reported, General Flynn briefed the Defense Intelligence Agency, a component agency of DoD, extensively regarding the RT speaking event trip both before and after the trip, and he answered any questions that were posed by DIA concerning the trip during those briefings," Kelner said in a statement to CNN Tuesday.

When asked by a reporter if the White House believed that Flynn broke the law in his SF-86 letter, White House press secretary Sean Spicer said he didn't know.

"That would be a question for him," Spicer said. "I don't know what he filled out or what he did or did not do. That all happened. He filled that form out prior to coming here. It would be up to the committee and other authorities to look at that. I don't know."

The news comes after the White House declined to provide documents related to Flynn that the panel investigating him had requested, according to a letter obtained by CNN.

White House Director of Legislative Affairs Marc Short outlined in a letter to the House oversight committee how it would not complete the request from the panel, referring some requests to the Department of Defense, saying the office doesn't have custody of some of the other documents or simply stating "we are unable to accommodate" others.

A White House aide disputed that the White House was withholding anything from the committee, saying they could not provide documents they do not have access to. The aide said that they directed oversight investigators to the appropriate agencies.

The announcement about Flynn comes a week after CNN reported that Jared Kushner, Trump's son-in-law and a senior adviser to the President, has yet to detail to the federal government all of his foreign contacts, a condition of receiving his top secret security clearance, CNN has learned.

When Kushner first submitted his forms to the FBI, he left the section about foreign contacts blank -- despite the fact that he had met with a large number of foreign emissaries and leaders once Donald Trump became the president-elect and he became the point man for international contacts for the incoming Trump administration.

Rep. Gerry Connolly, a Democratic member of the House oversight committee, said on CNN's "Erin Burnett OutFront" that there is "no question" Flynn had committed a crime.

Additionally, Connolly said he considers Kushner's failure to detail his foreign contacts as in the same category as Flynn's potential crime.

"We've got an outbreak here of violations of the law and nondisclosure," Connolly said. "We need to get to the bottom of it by getting our hands on the documents we've requested from the White House."

Whether Flynn properly disclosed payments from foreign governments on his security clearance application was the subject of the House oversight committee meeting Tuesday, as members reviewed the first batch of documents related to the investigation coming from the Pentagon.

The committee gathered Tuesday morning at the Capitol to review classified material provided by the Department of Defense in response to its March 22 request for more information on Flynn, according to MJ Henshaw, a spokeswoman for House Oversight Chairman Jason Chaffetz.

JUST WATCHED Spicer: We don't know if Flynn broke law Replay More Videos ... MUST WATCH Spicer: We don't know if Flynn broke law 01:20

The committee has sent additional requests for information about Flynn to the White House, the FBI and the Office of the Director of National Intelligence. However, Tuesday's meeting will only include responses from the Pentagon.

Oversight investigators also revealed last month that Flynn had received $530,000 for work his lobbying firm did that, according to the committee , likely benefited the Republic of Turkey.

The House and Senate intelligence committees have been leading the primary investigations into Russia's interference in the US elections and possible coordination with top aides to the Trump campaign. However, the House oversight panel has taken a particular focus on Flynn's work -- drilling down in a series of requests.

Flynn was forced to resign from his role as Trump's national security adviser after it was discovered he withheld information about discussions he had with Russian ambassador to the US Sergey Kislyak. Flynn is one of four former Trump aides at the center of the FBI's probe and is a top target for House and Senate investigators as well.