President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE said on Wednesday three Americans imprisoned in North Korea have been freed and are on their way home with Secretary of State Mike Pompeo Michael (Mike) Richard PompeoOvernight Defense: Pentagon redirects pandemic funding to defense contractors | US planning for full Afghanistan withdrawal by May | Anti-Trump GOP group puts ads in military papers Overnight Defense: House Democrats unveil stopgap spending measure to GOP opposition | Bill includes .6B for new subs | Trump issues Iran sanctions after world shrugs at US action at UN Navalny calls on Russia to return clothes he was wearing when he fell ill MORE, a major diplomatic breakthrough with a longtime U.S. adversary.

Trump took to Twitter to make the announcement, which has been expected for the last week.

“I am pleased to inform you that Secretary of State Mike Pompeo is in the air and on his way back from North Korea with the 3 wonderful gentlemen that everyone is looking so forward to meeting,” the president wrote.

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I am pleased to inform you that Secretary of State Mike Pompeo is in the air and on his way back from North Korea with the 3 wonderful gentlemen that everyone is looking so forward to meeting. They seem to be in good health. Also, good meeting with Kim Jong Un. Date & Place set. — Donald J. Trump (@realDonaldTrump) May 9, 2018

Trump said he would greet Pompeo and the three Americans at Joint Base Andrews at 2 a.m. Thursday morning.

Secretary Pompeo and his “guests” will be landing at Andrews Air Force Base at 2:00 A.M. in the morning. I will be there to greet them. Very exciting! — Donald J. Trump (@realDonaldTrump) May 9, 2018

The release of the Americans came while Pompeo was visiting North Korea to prepare for a high-stakes summit between Trump and North Korean leader Kim Jong Un aimed at denuclearizing the rogue nation.

Trump said Pompeo had a “good meeting" adding, “Date & Place set,” appearing to refer to a day and venue for the summit.

White House press secretary Sarah Huckabee Sanders said in a statement that Trump views the detainee release “as a positive gesture of goodwill” ahead of the talks.

She said the Americans “appear to be in good condition and were all able to walk on the plane without assistance.”

The U.S. has long demanded the release of Kim Dong-chul, Tony Kim and Kim Hak-song, the three American citizens who were imprisoned on charges of espionage or other anti-state activities against North Korea.

Their imprisonment, which was widely seen as unjust, further heightened tensions with Pyongyang at a time when Trump and Kim threatened each other with nuclear strikes.

Otto Warmbier, the last American to be released from North Korean custody, died shortly after returning for the U.S. Trump blamed North Korea for the brain damage and other injuries Warmbier suffered.

With the latest release, no other Americans are believed to be detained in North Korea, clearing the way for talks.

“We have been asking for the release of these detainees for … 17 months,” Pompeo told reporters in Japan on Tuesday before continuing onto Pyongyang. “I think it’d be a great gesture if they would choose to do so.”

The new secretary of State was on his second trip to North Korea this year to meet with Kim in preparation for the summit with Trump.

The meeting is expected to take place in May or early June.

Kim late last month met with South Korean President Moon Jae-in and crossed into South Korea for the first time.

-- Updated at 10:18 a.m.