WikiLeaks, the whistleblower Web site that released a trove of secret U.S. diplomatic documents, is back online after a crippling cyber attack rendered it inaccessible.
 
In a Twitter message sent Tuesday, WikiLeaks officials said their site was hit with a "denial of service attack" or DDoS, which hackers commonly use to slow down or disable a Web site.

"We are currently under another DDoS attack," WikiLeaks wrote on it's official Twitter feed, later saying that the "DDoS attack now exceeding 10 Gigabits a second."

Tuesday's DDoS assault disrupted usage for people in the U.S. and Europe.

WikiLeaks was also attacked on Sunday. However, the latest attack - believed to come from China - appeared to be more powerful.