Nigeria's President Goodluck Jonathan is threatening to sue a website that listed him as one of Africa's richest presidents, worth $100 million.

RichestLifestyle.com responded by withdrawing Jonathan's name from its list of nine African leaders ranging in supposed wealth from President Jose Eduardo dos Santos of Angola at $20 billion to Zimbabwe's President Robert Mugabe at $10 million.

A statement Friday from presidential adviser Reuben Abati condemned the "attempt to unjustifiably portray the president as a corrupt leader."

It said Jonathan's worth is "a very, very far cry" from $100 million and that he has regularly declared his assets as required by law. Jonathan has been criticized for not publicly declaring his worth.

The statement demands a retraction and unreserved apology or threatens legal action in and outside Nigeria.