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 was called to the White House on Friday after a scheduled meeting with national security adviser John Bolton and U.S. Ambassador to the United Nations Nikki Haley Nimrata (Nikki) Haley'The soul' versus 'law and order' Author Ryan Girdusky: RNC worked best when highlighting 'regular people' as opposed to 'standard Republicans' GOP lobbyists pleasantly surprised by Republican convention MORE was abruptly canceled, a State Department official said.

The official told The Hill that Pompeo had been asked to meet with 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, though the nature of that meeting was not immediately clear.

White House press secretary Sarah Huckabee Sanders played down the meeting, which was on neither Trump nor Pompeo's public schedule for Friday.

“It’s a routine meeting, guys. Nothing to panic about," she told reporters at the White House.

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The meeting between Pompeo and Trump comes days after North Korea threatened to back out of a June 12 summit with the U.S. president if Washington insisted on "unilateral nuclear abandonment."

Pompeo has been a key player in the Trump administration's efforts to set up the summit with North Korean leader Kim Jong Un. He traveled secretly to Pyongyang in April, and once again earlier this month, during which he secured the release of three American prisoners from the isolated country.

The meeting between Trump and Pompeo also comes days before the nation's chief diplomat is expected to deliver a speech at the conservative Heritage Foundation laying out a plan for reining in Iran's nuclear ambitions on other activities.

The speech follows Trump's announcement earlier this month that he would withdraw the U.S. from the 2015 nuclear deal with Iran, which sought to curb Tehran's nuclear program in exchange for sanctions relief.

Jordan Fabian contributed to this report, which was updated at 6:18 p.m.