About the Author
Oliver Hotham
Oliver Hotham was an NK News contributor based in Seoul, South Korea. Follow him on Twitter @oliverhotham.
Update at 1735 KST: This article has been updated periodically throughout the day to reflect the developing news.
A prominent consultant on North Korean business issues has been under investigation by Chinese authorities since Monday for engaging in activities that jeopardize the country's national security, the country's Ministry of Foreign Affairs (MFA) was reported to have confirmed on Thursday.