BBC: North Korea frees three US detainees ahead of Trump summit By BBC. Published May 9, 2018. Updated May 9 at 7:42 pm US Secretary of State Mike Pompeo greets an unidentified North Korean general on arrival at the Pyonyang, North Korea airport on May 9, 2018. Photo by AFP North Korea has freed three US citizens from prison, according to a tweet from US President Donald Trump. Read more here.