North Korean train crossing into China sparks rumor of possible 4th meeting between Kim, Xi

A mysterious North Korean train spotted crossing into China late Monday sparked rumors that leader Kim Jong Un was making his first visit of the year with Chinese President Xi Jinping amid talks of a possible second U.S.-North Korea summit.

Rumors about Kim’s visit to China began late Monday when a North Korean train painted green carrying a “senior North Korean official” was reported crossing over the North Korea-China border, South Korea’s Yonhap News Agency reported. Heavy security was spotted passing through the train station in the Chinese border city of Dandong just after 10 p.m. local time.

"It hasn't been confirmed whether a senior North Korean official was on the train," a source told Yonhap.

South Korea’s Hankyoreh newspaper also reported a North Korean official, possibly Kim, was on the train that crossed over the countries' border late Monday, according to Reuters. Kim used a very distinctive armored train made especially for him on visits to China last year.