The investigation continues in parallel. First priority was safety, which meant shutting everything down to prevent any additional issues or destruction of evidence. Second was giving people the ability to access their funds and to trade - a complete redeploy of the infrastructure which took us working 22/7 since Monday until just now.
An investigation is underway and we have some internal speculation from the first bits of information - the real statements will come after we aren't guessing. This is the first minute we've had to breathe this week.