U.S. President Donald Trump approved payment of a $2 million bill presented by North Korea to cover its care of comatose American Otto Warmbier, a college student who died shortly after being returned home from 17 months in a North Korean prison, the Washington Post reported on Thursday.

The Post said an invoice was handed to U.S. State Department envoy Joseph Yun hours before Warmbier, 22, was flown out of Pyongyang in a coma on June 13, 2017. Warmbier died six days later.

The U.S. envoy, who was sent to retrieve Warmbier, signed an agreement to pay the medical bill on instructions passed down from Trump, the Post reported, citing two unidentified people familiar with the situation.