One of the powers of a US president is to declassify information at any moment he chooses.

Roelofse detailed the difficulties he, and other Hawks operatives, has faced in trying to declassify information on the untouchable Mdluli.

A top official said earlier on Friday that intelligence officials were working to declassify information on the programs that Snowden had already partially disclosed.

The new findings include freshly declassified information, a State Department official told Reuters.

U.S. Special Envoy for Iran, Brian Hook, told Reuters that the newly- declassified information was more evidence that Tehran was behind the attack.

The Inspector-General of Intelligence and Security will investigate claims the Security Intelligence Service (SIS) declassified information and gave it to a blogger for political purposes.