Sierra Leone President Julius Maada Bio has said an investigation into allegations of corruption into the administration of his predecessor, President Ernest Bai Koroma, will lead to a large amount of property being confiscated and stolen money being returned to the state.

President Maada Bio said the commission of inquiry, led by foreign judges, was as a major breakthrough that would help make corruption unfashionable and risky.

"We have to draw the line... we cannot be this corrupt as a nation and expect to develop," he told the BBC's Umaru Fofana in Freetown.

A lawyer for Mr Koroma's opposition APC party has dismissed the allegations and said the party would challenge the findings in court.