http://www.bbc.com/news/world-us-canada-44056972

North Korea has freed three US citizens from prison, according to a tweet from US President Donald Trump.

The move is viewed as goodwill gesture ahead of a historic meeting between Mr Trump and North Korea's Kim Jong-un.

Mr Trump said he would greet the men when they return with Secretary of State Mike Pompeo, who has been in Pyongyang to arrange the planned talks.

Kim Hak-song, Tony Kim and Kim Dong-chul had been jailed for anti-state activities and placed in labour camps.

Who are the freed Americans?
Kim Hak-song was held on suspicion of "hostile acts" in May 2017. He had previously described himself as a Christian missionary who intended to start an experimental farm at the Pyongyang University of Science and Technology (PUST)

Tony Kim, also known as Kim Sang-duk, also worked at PUST. He was detained in April 2017 on espionage charges. According to South Korean media, he had been involved in humanitarian work in the North.

Kim Dong-chul, a pastor in his early 60s, was detained in 2015 on spying charges, and was then sentenced to 10 years hard labour.