More embarrassment for the Pentagon?

Wikileaks 'hacked ahead of secret US document release'

Whistle-blowing website Wikileaks says it is under attack from a computer-hacking operation, ahead of a suspected release of secret US government files.

"We are currently under a mass distributed denial of service attack," it says on its Twitter feed.

Wikileaks has said the release of classified state department documents will be bigger than past releases on Afghanistan and Iraq.

The US state department has said the release will put many lives at risk.

Wikileaks founder Julian Assange has said the US authorities are afraid of being held to account.