Mexican authorities say the number of confirmed swine flu cases in their country has risen by 259 to 1,578, with the number of death jumping by three to 48, AP reported. Health Department spokesman Carlos Olmos says all of the newly confirmed deaths occurred prior to May 6. Grade schools across Mexico are scheduled to re-open Monday, but officials in the western state of Jalisco say they will continue the school shutdown through May 18 because three people died there recently of flu-like illnesses. Olmos said Saturday the Jalisco have not been confirmed as swine flu.