S.Korea won falls to 3-yr low, shares rise after yuan devaluation

By Yeawon Choi SEOUL, Aug 11 (Reuters) - The South Korean won erased early gains to fall 1 percent versus the dollar on Tuesday and Seoul shares extended their gains after China's central bank devalued the yuan versus the dollar. The South Korean won was down 1 percent at 1,174.3 to the dollar as of 0251 GMT. The won touched a morning high of 1,155.7 and sharply fell to as low as 1,177.4, the lowest since June, 2012. China devalued the yuan, setting the mid-point for the yuan to 6.2