The leak of intelligence documents about operational details of South Africa's State Security Agency (SSA) may put the country's security at risk, an official has said.

The international news agency Al Jazeera said last month that it has gotten a number of documents detailing the work of intelligence agencies, including the SSA and Israel's Mossad.

Minister in the Presidency Jeff Radebe told a press briefing Thursday that the cabinet condemns the leak and welcomes an investigation by the SSA into the truth of it.

According to the leaked documents, the South African government and security agencies have left secrets exposed at every level and foreign spies have access to all areas of the government.