Nine of the 36 proclamations signed by President Jacob Zuma in the last five years have been completed, the presidency said on Tuesday.

"Nine investigations have been completed and reports have been submitted to the presidency, while 27 investigations are still ongoing," spokesman Mac Maharaj said in a statement.

"The reports indicate that progress is being made in the fight against corruption within the public service and the actions taken should serve as a deterrent to other officials."

A proclamation authorised the Special Investigating Unit (SIU) to probe departments and entities in the three spheres of government and state-owned enterprises.

The presidency said one of the ongoing investigations was into spending at Zuma's private home in Nkandla, KwaZulu-Natal.

In a report released in March, Public Protector Thuli Madonsela found Zuma and his family had unduly benefited from the R246 million spent on security upgrades at the Nkandla home. The SIU was investigating the matter.

In the batch of nine completed proclamations was the probe into the department of arts and culture's underspending, or misspending, of its budgets for the 2010 Fifa World Cup projects for the 2007, 2008 and 2009 financial years.

Another completed proclamation was about allegations made about SABC staff, which included undisclosed or unauthorised conflicts of interest with the national broadcaster's service providers.

Other completed probes included municipalities in the Western Cape and the Eastern Cape department of education.

Investigations still being undertaken involved a number of national and provincial departments such as municipalities in the North West, the Gauteng health department, and the national department of rural development and land reform.

Eskom, the SA Social Security Agency and the SA Police Service were also being probed.