ZIMBABWE will appoint a commission to investigate the "treasonous collusion" that led to several embarrassing reports being released by WikiLeaks, attorney-general Johannes Tomana has said.

"With immediate effect, I am going to instruct a team of practising lawyers to look into the issues that arise from the WikiLeaks," Attorney-General Johannes Tomana told the state-owned Herald newspaper.

"The WikiLeaks appear to show a treasonous collusion between local Zimbabweans and the aggressive international world, particularly the United States."

Tomana was this week slapped with sanctions and an asset freeze by the United States, making him the latest ally of long-ruling President Robert Mugabe to be black-listed by the US government.

His statements came after WikiLeaks a series of cables from US diplomats that have been embarrassing to Mugabe and his inner circle as well as Prime Minister Morgan Tsvangirai and members of his MDC-T party.

One discussed the United Nations' efforts to get Mugabe to stand down by offering him a retirement package and an exile deal. Another contained accusations that Mugabe's wife, Grace, and Central Bank Governor Gideon Gono were earning huge profits from illegal diamonds.

Mugabe's wife and Gono deny the allegations. The pair has filed a lawsuit claiming 15 million dollars in damages from a local independent weekly that reproduced a WikiLeaks report which said she had been involved in underhand sales of diamonds from the controversial Marange mines.

But Zanu PF officials have demanded that Tsvangirai be charged with treason following revelations that he privately urged Western countries to maintain sanctions against the country while publicly appearing to back calls for their removal.

A senior MDC-T official and cabinet minister, Elton Mangoma was also alleged to have sought the support of the US and other Western governments in establishing a fund aimed at buy-off the country’s security service chief’s who are seen as fiercely local to Mugabe and Zanu PF.