The House Intelligence Committee issued seven subpoenas Wednesday as part of its investigation into Russian interference in the 2016 election, including subpoenas to former national security adviser Michael Flynn and President Donald Trump's personal lawyer, Michael Cohen.

"As part of our ongoing investigation into Russian active measures during the 2016 campaign, today we approved subpoenas for several individuals for testimony, personal documents and business records," said Reps. Mike Conaway and Adam Schiff, the top Republican and Democrat involved in the investigation.

"We hope and expect that anyone called to testify or provide documents will comply with that request, so that we may gain all the information within the scope of our investigation. We will continue to pursue this investigation wherever the facts may lead," they said.

19 PHOTOS Michael Flynn See Gallery Michael Flynn National security adviser General Michael Flynn delivers a statement daily briefing at the White House in Washington U.S., February 1, 2017. REUTERS/Carlos Barria Retired Lt. Gen. Michael Flynn arrives at the Trump Tower for meetings with US President-elect Donald Trump, in New York on November 17, 2016. (EDUARDO MUNOZ ALVAREZ/AFP/Getty Images) Retired United States Army lieutenant general Michael T. Flynn introduces Republican Presidential nominee Donald J. Trump before he delivered a speech at The Union League of Philadelphia on September 7, 2016 in Philadelphia, Pennsylvania. Trump spoke about his plans to build up the military if elected. Recent national polls show the presidential race is tightening with two months until the election. (Photo by Mark Makela/Getty Images) Retired Lt. Gen. Michael Flynn, at podium, and Republican presidential candidate Donald Trump attend a campaign event with veterans at the Trump International Hotel on Pennsylvania Ave., NW, where Trump stated he believes President Obama was born in the United States, September 16, 2016. (Photo By Tom Williams/CQ Roll Call) WASHINGTON, DC - FEBRUARY 01: White House Press Secretary Sean Spicer (L) yields the briefing room podium to National Security Adviser Michael Flynn February 1, 2017 in Washington, DC. Flynn said the White House is 'officially putting Iran on notice' for a recent missile test and support for Houthi rebels in Yemen. (Photo by Win McNamee/Getty Images) Army Lt. Gen. Michael Flynn, director of the Defense Intelligence Agency, prepares to testify at a Senate Armed Services Committee hearing in Dirksen Building titled 'Current and Future Worldwide Threats,' featuring testimony by he and James Clapper, Director of National Intelligence. (Photo By Tom Williams/CQ Roll Call) White House National Security Advisor Michael Flynn (C) arrives prior to a joint news conference between Canadian Prime Minister Justin Trudeau and U.S. President Donald Trump at the White House in Washington, U.S., February 13, 2017. REUTERS/Carlos Barria U.S. National Security Advisor Michael Flynn boards Air Force One at West Palm Beach International airport in West Palm Beach, Florida U.S., February 12, 2017. REUTERS/Carlos Barria National security adviser General Michael Flynn arrives to deliver a statement during the daily briefing at the White House in Washington U.S., February 1, 2017. Picture taken February 1, 2017. REUTERS/Carlos Barria White House National Security Advisor Michael Flynn (L) arrives at Joint Base Andrews, Maryland, U.S., February 10, 2017. REUTERS/Carlos Barria WASHINGTON, DC - FEBRUARY 10: (AFP OUT) White House National Security Advisor Michael Flynn (R) walks down the West Wing Colonnade following a bilateral meeting between U.S. President Donald Trump and Japanese Prime Minister Shinzo Abe February 10, 2017 in Washington, DC. Trump and Abe are expected to discuss many issues, including trade and security ties and will hold a joint press confrence later in the day. (Photo by Chip Somodevilla/Getty Images) ATLANTA, GA - FEBRUARY 02: (L-R) SCAD Dramatic writing professor Chris Auer, Producer Sandra Leviton, Executive producer and writer Michael Flynn, Tv literary agent Jeff Greenberg and Literary manager and producer Kaila York speak on stage during the 'Inside the Writers Room' event on Day One of aTVfest 2017 presented by SCAD on February 2, 2017 in Atlanta, Georgia. (Photo by Vivien Killilea/Getty Images for SCAD) Lieutenant General Michael Flynn (ret.), National Security Advisor Designate speaks during a conference on the transition of the US Presidency from Barack Obama to Donald Trump at the US Institute Of Peace in Washington DC, January 10, 2017. / AFP / CHRIS KLEPONIS (Photo credit should read CHRIS KLEPONIS/AFP/Getty Images) Retired Lieutenant General Michael Flynn, U.S. national security advisor, attends a swearing in ceremony of White House senior staff in the East Room of the White House in Washington, D.C., U.S., on Sunday, Jan. 22, 2017. Trump today mocked protesters who gathered for large demonstrations across the U.S. and the world on Saturday to signal discontent with his leadership, but later offered a more conciliatory tone, saying he recognized such marches as a hallmark of our democracy. Photographer: Andrew Harrer/Bloomberg via Getty Images WASHINGTON, DC - JANUARY 20: Michael Flynn walks out after a morning worship service on Inauguration day at St. John's Episcopal Church in Washington, DC on Friday, Jan. 20, 2017. (Photo by Jabin Botsford/The Washington Post via Getty Images) WASHINGTON, DC - JANUARY 20: Attorney General nominee Sen. Jeff Sessions (R-AL) (R), talks with National Security Advisor Michael Flynn inside of the inaugural parade reviewing stand in front of the White House on January 20, 2017 in Washington, DC. Donald Trump was sworn in as the nation's 45th president today. (Photo by Mark Wilson/Getty Images) Retired Lieutenant General Michael Flynn, White House national security adviser-designate, center, stands in an elevator at Trump Tower in New York, U.S., on Thursday, Jan. 12, 2017. Donald Trump is slated to meet with AT&T Inc.'s top executives on Thursday to discuss the company's proposed $85.4 billion bid for Time Warner Inc., according to people familiar with the matter. The president-elect has said he opposes the deal. Photographer: John Taggart/Bloomberg via Getty Images WASHINGTON, DC - JANUARY 20: Donald Trump's National Security Adviser Gen. Michael T. Flynn (R) arrives on the West Front of the U.S. Capitol on January 20, 2017 in Washington, DC. In today's inauguration ceremony Donald J. Trump becomes the 45th president of the United States. (Photo by Drew Angerer/Getty Images) Lieutenant General Michael Flynn (ret.) and National Security Advisor Designate and Ambassador Susan Rice, National Security Advisor during a ceremonial passing of authority while participating in a conference on the transition of the US Presidency from Barack Obama to Donald Trump at the US Institute Of Peace in Washington DC, January 10, 2017. / AFP / CHRIS KLEPONIS (Photo credit should read CHRIS KLEPONIS/AFP/Getty Images) Up Next See Gallery Discover More Like This HIDE CAPTION SHOW CAPTION of SEE ALL BACK TO SLIDE

Four of the seven subpoenas were related to the committee's probe into Russian interference in the election, according to The Wall Street Journal. Flynn's lobbying firm, Flynn Intel Group, was also subpoenaed, as was Cohen's firm, Michael D. Cohen & Associates.

Flynn was forced to resign when it was reported in February that he had spoken to the Russian ambassador about US sanctions and then misled Vice President Mike Pence about his contacts. Flynn reportedly plans to invoke his Fifth Amendment rights in response to a separate subpoena issued by the Senate Intelligence Committee. Cohen's subpoena comes after he declined a request to provide information and documents related to his contacts with Russian officials.

Cohen told ABC on Tuesday that he "declined the invitation to participate, as the request was poorly phrased, overly broad, and not capable of being answered." He later told CNN that the lawmakers "have yet to produce one single piece of credible evidence that would corroborate the Russia narrative."

The other three subpoenas relate to questions around why Obama administration officials "unmasked" and distributed the names of Trump associates in classified intelligence reports.

18 PHOTOS Donald Trump's longtime lawyer Michael Cohen See Gallery Donald Trump's longtime lawyer Michael Cohen U.S. President Donald Trump's personal lawyer Michael Cohen exits a hotel in New York City, U.S., April 11, 2018. REUTERS/Brendan McDermid Michael Cohen, personal attorney for U.S. President Donald Trump, arrives to appear before Senate Intelligence Committee staff as the panel investigates alleged Russian interference in the 2016 U.S. presidential election, on Capitol Hill in Washington, U.S. September 19, 2017. REUTERS/Jonathan Ernst U.S. President Donald Trump's personal lawyer Michael Cohen drives after leaving his hotel in New York City, U.S., April 11, 2018. REUTERS/Brendan McDermid Attorney Michael Cohen arrives at Trump Tower for meetings with President-elect Donald Trump on December 16, 2016 in New York. (BRYAN R. SMITH/AFP/Getty Images) Michael Cohen, personal attorney for U.S. President Donald Trump, talks to reporters as he departs after meeting with Senate Intelligence Committee staff as the panel investigates alleged Russian interference in the 2016 U.S. presidential election, on Capitol Hill in Washington, U.S. September 19, 2017. REUTERS/Jonathan Ernst Retired Lt. Gen. Michael Flynn, President-elect Donald Trump's choice for National Security Advisor, Michael Cohen, executive vice president of the Trump Organization and special counsel to Donald Trump, and former Texas Governor Rick Perry talk with each other in the lobby at Trump Tower, December 12, 2016 in New York City. President-elect Donald Trump and his transition team are in the process of filling cabinet and other high level positions for the new administration. (Photo by Drew Angerer/Getty Images) UNITED STATES - SEPTEMBER 19: Michael Cohen, center, a personal attorney for President Trump, leaves Hart Building after his meeting with the Senate Intelligence Committee to discuss Russian interference in the 2016 election was postponed on September 19, 2017. (Photo By Tom Williams/CQ Roll Call) Attorney Michael Cohen arrives to Trump Tower for meetings with President-elect Donald Trump on December 16, 2016 in New York. (BRYAN R. SMITH/AFP/Getty Images) Michael Cohen, President Donald Trump's personal attorney arrives with his attorney, Stephen M. Ryan to speak with reporters after meeting with Senate Intelligence Committee staff on Capitol Hill in Washington, U.S., September 19, 2017. REUTERS/Aaron P. Bernstein Retired Lieutenant General Michael Flynn, White House national security adviser-designate, from left, Michael Cohen, executive vice president of the Trump Organization and special counsel to Donald Trump, and Rick Perry, former governor of Texas, speak in the lobby of Trump Tower in New York, U.S., on Monday, Dec. 12, 2016. Senate Majority Leader Mitch McConnell said he had the 'highest confidence' in the intelligence community, in sharp contrast to President-elect Donald Trump's attack on the CIA after reports it found that the Russian government tried to help him win the presidency. (Albin Lohr-Jones/Pool via Bloomberg) Michael Cohen, President Donald Trump's personal attorney, looks on as his attorney (not pictured) delivers a statement to reporters after meeting with Senate Intelligence Committee staff on Capitol Hill in Washington, U.S., September 19, 2017. REUTERS/Aaron P. Bernstein Attorney Michael Cohen arrives to Trump Tower for meetings with President-elect Donald Trump on December 16, 2016 in New York. (BRYAN R. SMITH/AFP/Getty Images) UNITED STATES - SEPTEMBER 19: Michael Cohen, center, a personal attorney for President Trump, leaves Hart Building after his meeting with the Senate Intelligence Committee to discuss Russian interference in the 2016 election was postponed on September 19, 2017. (Photo By Tom Williams/CQ Roll Call) U.S. President Donald Trump's personal lawyer Michael Cohen exits a hotel in New York City, U.S., April 11, 2018. REUTERS/Brendan McDermid U.S. President Donald Trump's personal lawyer Michael Cohen is pictured leaving a restaurant in the Manhattan borough of New York City, New York, U.S., April 10, 2018. REUTERS/Amir Levy Michael Cohen, President Donald Trump's personal attorney, arrives with his attorney, Stephen M. Ryan, on Capitol Hill in Washington, U.S., October 25, 2017. REUTERS/Aaron P. Bernstein U.S. President Donald Trump's personal lawyer Michael Cohen is pictured arriving at his hotel in the Manhattan borough of New York City, New York, U.S., April 10, 2018. REUTERS/Amir Levy Michael Cohen, personal attorney for U.S. President Donald Trump, departs after meeting with Senate Intelligence Committee staff as the panel investigates alleged Russian interference in the 2016 U.S. presidential election, on Capitol Hill in Washington, U.S., September 19, 2017. REUTERS/Jonathan Ernst Up Next See Gallery Discover More Like This HIDE CAPTION SHOW CAPTION of SEE ALL BACK TO SLIDE

The Journal reported that those subpoenas were issued to the CIA, FBI, and NSA and are seeking information related to unmasking requests made by former national security adviser Susan Rice, former CIA director John Brennan, and former United Nations ambassador Samantha Power.

Unmasking requests are not uncommon, said Charles Price, a former FBI agent who worked at the bureau for nearly three decades. "They're really not that big a deal."

"The identities of US persons may be released under two circumstances: 1) the identity is needed to make sense of the intercept; 2) if a crime is involved in the conversation," said Robert Deitz, a former senior counselor to the CIA director and former general counsel at the National Security Agency.

The subpoenas related to unmasking requests were reportedly made by Republicans on the committee interested in examining whether the requests were politically motivated, The Journal reported.

In April, it emerged that Rice tried to learn the identities of Trump officials whose names were incidentally collected during routine intelligence-gathering operations.

After news of Rice's request broke, she denied accusations that she had leaked the names of unmasked Trump officials to media outlets.

"I don't take much" from the subpoenas issued related to unmasking requests, Deitz said. He added that he saw them as a concession to Trump supporters on the committee and that they likely wouldn't result in any damning information.

The Trump-Russia investigations, both in relevant congressional committees and within the FBI, have picked up steam over the last few weeks, following Trump's decision to abruptly fire FBI Director James Comey,

After Comey's dismissal and a number of explosive reports, Deputy Attorney General Rod Rosenstein appointed former FBI director Robert Mueller as a special counsel in charge of the FBI's investigation.

Last week, multiple reports said Trump's son-in-law and senior adviser, Jared Kushner, spoke to the Russian ambassador about setting up a back channel of communications with Russia, using Russian facilities. News of his reported request indicated that the Russia investigation may reach the highest levels of Trump's White House.

On Wednesday, CNN reported that Comey plans to testify as early as next week, during which he is expected to confirm reports that Trump asked him to drop the FBI's investigation into Flynn during a February meeting. Experts say such a request could amount to obstruction of justice.

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