Atiku said former President Obasanjo should be thoroughly investigated because of what he called the startling revelations from the House of Representatives probe on Energy sector.

In an interview with select newsmen Atiku said: "To the best of my knowledge I cannot recollect one project which was started and completed, owing to lack of vision, bad leadership, mismanagement and corruption.

There is , therefore, the need for a thorough investigation of the immediate past regime."

He also took a swipe at President Umaru Musa Yar'Adua's administration, which he said, has not moved Nigeria forward in the last 10 months.

According to him: "I don't know whether they are still slow or they don't have the idea or the vision."

He described President Yar'Adua as his brother whom he has always offered advice as president but he said it is up to him to take such advice.