Secretary of State Mike Pompeo is speaking to reporters Thursday, after meeting with top North Korean official Kim Yong Chol in New York City.

Pompeo, who is helping spearhead conversations ahead of a possible summit with North Korea next month, met with Kim for dinner Wednesday night. Whether the summit will happen June 12, or at all, remains to be seen. But Mr. Trump and top administration officials have been more optimistic since the president called off the summit last week.

Follow Mike Pompeo's North Korea meeting briefing - live updates below

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Trump says North Koreans will deliver him a letter

Mr. Trump told reporters Thursday North Korea is expected to deliver him a letter from Kim Jong Un on Friday in Washington. It's unclear what that letter might contain.

Pompeo tweets about "good progress" made

On Thursday afternoon, Pompeo tweeted that "good progress" was being made in meetings with the North Koreans.

"Good progress today during our meetings with Kim Yong Chol and his team," Pompeo tweeted. "#NorthKorea and the world would benefit greatly from the denuclearization of the Korean Peninsula."

North Korea summit update

On Fox News Thursday morning, White House deputy press secretary Raj Shah said the summit is still expected to take place June 12, and Mr. Trump tweeted that meetings with North Korea were going well.

The president also told Reuters Thursday that it might take more than one meeting to make a deal to denuclearize the Korean peninsula. He also said he's expecting a letter from Kim Jong Un to be delivered by Kim Yong Chol Friday.