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A special train is seen at Beijing Railway Station in Beijing Tuesday, March 27, 2018. Speculation about a visit to Beijing by North Korean leader Kim Jong Un or another high-level Pyongyang official was running high Tuesday amid talk of preparations for a meeting between the North's reclusive leader and President Donald Trump. (Kyodo News via AP)
A special train is seen at Beijing Railway Station in Beijing Tuesday, March 27, 2018. Speculation about a visit to Beijing by North Korean leader Kim Jong Un or another high-level Pyongyang official was running high Tuesday amid talk of preparations for a meeting between the North's reclusive leader and President Donald Trump. (Kyodo News via AP)

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    Kim Jong Un possibly on mystery train to China

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Kim Jong Un possibly on mystery train to China

Images of an old-style green train car that pulled into Beijing began circulating online, prompting speculation that the North Korean leader or another high-level representative from Pyongyang could be in the Chinese capital.

Kim Jong Un possibly on mystery train to China

Images of an old-style green train car that pulled into Beijing began circulating online, prompting speculation that the North Korean leader or another high-level representative from Pyongyang could be in the Chinese capital.