WikiLeaks on Monday began to publish more than 5 million emails from Texas-based intelligence company Stratfor.

The emails span a seven year period beginning in July 2004 and detail Stratfor's dealings with big corporations such as Dow Chemical, Lockheed Martin, and Raytheon, as well as government agencies like the Department of Homeland Security and the Defence Intelligence Agency, WikiLeaks said in a statement.

WikiLeaks did not reveal its source, but Stratfor noted in a statement of its own that in December it suffered a breach at the hands of hacker collective Anonymous, which swiped thousands of emails and published names, contact info, credit card numbers, and other personal data of thousands of Stratfor subscribers.

Anonymous has previously spoken out in support of WikiLeaks' efforts.

Stratfor claimed that some of the emails WikiLeaks has released have been forged to include inaccuracies. It also acknowledged that some are accurate but said it will not make the distinction either way.

Stratfor also stressed that WikiLeaks' release does not mean it has been hacked again.

WikiLeaks said the data "contains privileged information about the U.S. government's attacks against [WikiLeaks head] Julian Assange and WikiLeaks and Stratfor's own attempts to subvert WikiLeaks." The emails also "expose the revolving door that operates in private intelligence companies in the United States. Governments and diplomatic sources from around the world give Stratfor advance knowledge of global politics and events in exchange for money," WikiLeaks said.

In order to analyze the documents, WikiLeaks said it's working with more than 25 media partners, including Rolling Stone and McClatchy in the U.S.

Meanwhile, Assange remains under house arrest at a London estate, fighting against extradition to Sweden, where he must answer to allegations of sexual misconduct.