Update: Most funds are secure, seems only 0.5% was taken. More news as it becomes available.
Update 2: "119,756 BTC STOLEN"
The Bitfinex website has been taken offline!
OFFICIAL STATMENT FROM BITFINEX
Security breach on Bitfinex
Today we discovered a security breach that requires us to halt all trading on Bitfinex, as well as halt all digital token deposits to and withdrawals from Bitfinex.
We are investigating the breach to determine what happened, but we know that some of our users have had their bitcoins stolen. We are undertaking a review to determine which users have been affected by the breach. While we conduct this initial investigation and secure our environment, bitfinex.com will be taken down and the maintenance page will be left up.
The theft is being reported to — and we are co-operating with — law enforcement.
As we account for individualized customer losses, we may need to settle open margin positions, associated financing, and/or collateral affected by the breach. Any settlements will be at the current market prices as of 18:00 UTC. We are taking this necessary accounting step to normalize account balances with the objective of resuming operations. We will look at various options to address customer losses later in the investigation. While we are halting all operations at this time, we can confirm that the breach was limited to bitcoin wallets; the other digital tokens traded on Bitfinex are unaffected.
We will post updates as and when appropriate on our status page, bitfinex.statuspage.io. We are deeply concerned about this issue and we are committing every resource to try to resolve it. We ask for the community’s patience as we unravel the causes and consequences of this breach.
bitfinex.statuspage.io, support@bitfinex.com
Coincidentally I reported a bug to bitfinex about a week ago and removed most if not all my funds if I can remember correctly.
I do hope these guys get this resolved. They were one to the TOP bitcoin Exchanges
UPDATE: Taken from a post on the bitcoin sub-reddit these are supposedly some of the missing funds.
Here are some of the address of users:
https://blockchain.info/address/3Kf31ywzMjF6W48NM1WByRgescEJaGDAAV
https://blockchain.info/address/3NMkeWidzL7MQbrdMR9m7guANcNJofxyJD
https://blockchain.info/address/32JUrk6gPDj2sJ4FM8HhHSC8g957cRDS2e
https://blockchain.info/address/33qM1scZDyxS6DkUXNUmMwFs3QG1Qbu9JF
https://blockchain.info/address/3BxsErcrcDaQR8US4NgpzR444shG41ncZq
https://blockchain.info/address/39S5vfCQn83iLYaNX2zbBxe28V3pZzgqRg
https://blockchain.info/address/3PwkxeykAgVUc1VRhawr6aSEWobsS7GfHn
https://blockchain.info/address/3ACXE9RVVW8R8wrvrwqqnFaviudFPzSH1c
UPDATE AGAIN: BitGo Servers were NOT breached