It should be standard practice when practicing respectable journalism to verify an information from at least 3 sources. I see mainstream media like Marketwatch or Wired picked up on this news without verifying it. It's also featured on Coindesk as front page article.
Only source that released this info is a Thai exchange(
https://bitcoin.co.th/). There's no other source basically. This is a small exchange by all standards operating in Thailand. It could be a scam for all we know. They might have invented a reason for shutting down and running away with customer money. They will most likely argue they can't send the deposited Bitcoins back to customers because it's now illegal to do so. How convenient for them!
Don't you find it a bit weird that the other two Thai exchanges are still open for business and didn't take part of that alleged meeting with Thai central bankers?