China's Zhaojin Mining raises buyout bid for Australia's Tietto Minerals to $474m

China's Zhaojin Mining raises buyout bid for Australia's Tietto Minerals to $474m

FILE PHOTO: Flakes of gold leaf are pictured in Tokyo April 4, 2008. REUTERS/Michael Caronna/File Photo

Zhaojin Mining Industry said on Monday it is increasing its offer for the shares it does not already own in Australian gold explorer Tietto Minerals to up to about A$733 million ($474 million).