Australia's Alumina, said on Wednesday its underlying 2006 profit fell 10%, due to higher operating costs and a strong Australian dollar, sending its shares down over 2%.

Net profit for the six months to June 30 came in at A$284.3 million compared with A$259.9 million a year ago, but the company said underlying earnings were A$271.0 million, down from A$302.0 million a year ago.