Let's not panic just yet, but in the middle of trading this morning and all trading was halted.. One of Bitttrex founders Rami Kawach first posted in the help desk- news section that a data upgrade caused more intteruption than anticipated, so they froze trading as a precaution.
Wallets are still functional, but I will not be the first to try and transfer any funds...
A few minutes later Rami tweeted it was over a 1Tb to 4Tb upgrade of their main data storage:
If this is a United States company, why upgrade at this time? It's like working on the roads during rush hour...