"As soon as North Korea side told me that this bill for $2 million would have to be paid… I contacted my boss then-Secretary of State Rex Tillerson," Yun said in an interview on CNN.
National Security Adviser John Bolton confirmed in an interview with Fox News on Sunday that the United States signed an agreement, but had not paid any money.
The Washington Post first reported that North Korea had presented the United States with the $2 million bill for Warmbier’s hospital care, which the paper characterized as "extraordinarily brazen even for a regime known for its aggressive tactics."
Warmbier, who visited North Korea as a tourist was detained in January 2016. He was returned to the United States in a coma and died within a week.