Lava flowing from Philippine volcano, thousands evacuated

LEGAZPI, Philippines - Nearly 15,000 people have fled from villages around the Philippines' most active volcano as lava flowed down its crater Monday in a gentle eruption that scientists warned could turn explosive.The Philippine Institute of Volcanology and Seismology increased the alert level for Mount Mayon late Sunday to three on a scale of five, indicating an increased prospect of a hazardous eruption "within weeks or even days."Lava flowed at least half a kilometer (less than half a mile)