EDIT:
It seems it was not hacked but shutdown.They arrested the btc-e owner for money laundering accusations!
https://www.coindesk.com/btc-e-connected-bitcoin-money-laundering-arrest-greece/
https://uk.reuters.com/article/uk-greece-russia-arrest-idUKKBN1AB1O9
Popular Russian bitcoin exchange BTC-e has been down for almost 3 hours with the official twitter saying they are having a "server maintenance".
The weird thing is, they have never had maintenance works without prior announcements in the past. And coincidently, bitcoin prices have been crashing since btc-e went down.
Are they hacked and just denying the attack by calling it a maintenance job (like most hacked websites choose to do) ??
Hopefully, btc-e comes back online soon.
read more on bitcointalk here
We are still continue to perform our unscheduled ongoing maintenance. Will keep you updated. Sorry for the inconvenience.
follow btc-e on twitter here