WASHINGTON - The United States is bracing for yet another unauthorised release of classified government documents, which officials say this time could damage US relations with close allies, including Pakistan, according to media reports. Government officials say WikiLeaks, the website responsible for leaking hundreds of thousands of secret reports related to the Afghan and Iraq wars, could dump its next round of documents this weekend. This time the State Department is on alert as WikiLeaks founder, Julian Assange, has said the organisation has access to several hundred thousand sensitive diplomatic cables. The US Department of State has been working overtime to warn its allies that Wikileaks could be releasing highly sensitive details about the inner workings of government and diplomatic relations. We are prepared for the worst-and the worst is that this will have an impact on our diplomatic relations with many, many countries, State Department spokesman PJ Crowley said. They are going to create tension in relationships between our diplomats and our friends around the world. Crowley told reporters at the State Department that US diplomatic outposts across the world have begun the process of notifying other governments of the impending leak. This is going to be potentially global in its impact, Crowley added. Youre talking hundreds of thousands of cables that touch on relationships with hundreds countries. Iraq, Afghanistan and Pakistan are on the list of countries the State Department worries about but Crowley says it pays equal attention to countries such as Zimbabwe that get more sporadic media attention. Diplomatic cables can include anything from research ahead of delegations, to read-outs of high-level meetings and analysis of emerging events. The Pentagon, still reeling over the 700,000 secret Afghan war documents exposed by WikiLeaks in late October, says it wont go unscathed in this new release. There are some Department of Defence related issues in these cables, Pentagon Spokesman Col. David Lapan said. Congressional officials say there is a specific concern in the Pentagon that he documents contain potentially damaging information about Guantanamo detainees. AFP adds: Governments around the world on Saturday braced for the release of millions of potentially embarrassing US diplomatic cables by WikiLeaks as Washington raced to contain the fallout. The whistle-blower website is expected to put online three million leaked cables covering US dealings and confidential views of countries including Australia, Britain, Canada, Israel, Russia and Turkey. US diplomats skipped their Thanksgiving holiday weekend and headed to foreign ministries hoping to stave off anger over the cables, which are internal messages that often lack the niceties diplomats voice in public. WikiLeaks are an absolutely awful impediment to my business, which is to be able to have discussions in confidence with people. I do not understand the motivation for releasing these documents, said James Jeffrey, the US ambassador to Iraq. They will not help, they will simply hurt our ability to do our work here, he told reporters. The top US military commander, Admiral Mike Mullen, meanwhile urged WikiLeaks to stop its 'extremely dangerous release of documents, according to a transcript of a CNN interview set to air Sunday.