SPECULATION last night that WikiLeaks may reveal clandestine US support for terrorism had US embassies across the globe scrambling to limit damage ahead of the latest threatened release of US government documents by the whistleblowing website.

WikiLeaks is planning to make available up to 400,000 sensitive cables from the past five years that include talks with politicians, government officials and journalists, as well as evaluations by US diplomats about their host countries.

According to the London-based Arabic-language newspaper al-Hayat, several documents show that the US had in turn been providing assistance to Turkey's Kurdish separatist movement, the PKK.

Founded in the 1970s, the PKK is listed as a terrorist organisation in Turkey, the US, the European Union and Australia.

A report in Israel's Jerusalem Post said the US military documents refer to the PKK as ''warriors for freedom and Turkish citizens'' and say that the US had set free arrested PKK members in Iraq.