President Donald Trump on Friday denied that his administration had paid any money as part of a deal to get North Korea to return American student Otto Warmbier, whom the regime had detained.

"No money was paid to North Korea for Otto Warmbier, not two Million Dollars, not anything else," Trump tweeted.

No money was paid to North Korea for Otto Warmbier, not two Million Dollars, not anything else. This is not the Obama Administration that paid 1.8 Billion Dollars for four hostages, or gave five terroist hostages plus, who soon went back to battle, for traitor Sgt. Bergdahl! — Donald J. Trump (@realDonaldTrump) April 26, 2019

“President Donald J. Trump is the greatest hostage negotiator that I know of in the history of the United States. 20 hostages, many in impossible circumstances, have been released in last two years. No money was paid.” Cheif Hostage Negotiator, USA! — Donald J. Trump (@realDonaldTrump) April 26, 2019

Later, Trump told reporters at the White House that, "We did not pay money for our great Otto."

"I haven't paid money for any hostage," he said, adding that, "the Otto case is a very unusual case."

The tweet, and comments,came in response to a Washington Post report Thursday that North Korea had issued a $2 million bill to the United States for the medical care of Warmbier, who was returned in an unconscious state.

The regime, The Post reported, demanded that a U.S. official sign a pledge to pay the bill before Warmbier would be returned.

State Department official Joseph Yun, who had traveled to North Korea in 2017 to help retrieve Warmbier, was instructed to sign the agreement by Trump and did so, The Post said. The bill was sent to the U.S. Treasury Department and remained unpaid throughout 2017. The Post said it was not clear whether the bill was later paid.

Responding to questions from NBC News about the report, White House press secretary Sarah Sanders said Thursday, "We do not comment on hostage negotiations, which is why they have been so successful during this administration."

Warmbier, 22, was arrested for taking a propaganda banner from a hotel while on a visit to Pyongyang in January 2016. The University of Virginia student from Ohio was later sentenced to 15 years of hard labor.

The North Korean government released him in June 2017, and when he returned to U.S. soil, doctors found him to be in a state of unresponsive wakefulness. He died days later; the exact cause of death is still not known.

His parents, Fred and Cindy Warmbier, were told he had been in a coma since shortly after being sentenced.

In February, Trump was slammed by politicians on both sides of the aisle after he absolved North Korean leader Kim Jong Un of blame in Warmbier's death. Following a summit with Kim, Trump said at a press conference in Hanoi, Vietnam, that it "just wasn’t to (Kim's) advantage to let that happen." He added: "He tells me that he didn't know about it, and I will take him at his word."

The president later tweeted that his comments had been misinterpreted and said, "Of course I hold North Korea responsible."