A train believed to be carrying a senior North Korean delegation left the Chinese capital on Tuesday following a dramatic whirlwind visit that some reports said included the country's leader, Kim Jong Un.
South Korea said it was closely watching events in Beijing, where a Foreign Ministry spokeswoman deflected a question on whether Kim, his sister or some other senior North Korean was visiting.
"At present I have no understanding of the situation you mention. If there is news we will release it," Foreign Ministry spokeswoman Hua Chunying told a regular daily briefing.