If you haven't know it yet, bitgrail was hacked a few months ago and the hacker took millions of dollars worth of nano cryptocurrency (former raiblocks) that's is why they are under investigation. So yes they are temporarily suspending all of their services at the moment, because the court ordered an immediate shutdown after they resumed their service, the suspension will take effect until the court made a decision that is scheduled to be announced May 16 2018. This is the official announcement by bitgrail here
https://bitgrail.com/news and you can also check the updates about that exchange.
