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Kim Jong-un has reportedly made a secret visit to China in what would have been his first foreign visit in seven years.
Footage emerged today showing a heavily armoured train believed to be carrying a senior visiting North Korean delegation leaving Beijing.
It was released as diplomatic sources confirmed a senior North Korean official had visited China as part of a series of historic summits.
A huge convoy of black cars with blacked out windows were also seen travelling through the city centre flanked by dozens of security officials on motorbikes.