North Korea"s authorities have released...

The move is seen as a gesture made in attempt to improve ties with the U.S.

"An American missionary arrived in Beijing on Saturday," the agency said, without giving any further details.

Robert Park, 28, was detained at the North Korean-Chinese border, after he crossed into North Korea over the frozen Tumen River separating the two countries.

Park"s fellow activists said he intended to call international attention to the large number of human rights violations in the communist state, which is believed to maintain several concentration camps for political prisoners.

MOSCOW, February 6 (RIA Novosti)