JAKARTA - More than 25,000 people have fled their homes following a series of eruptions and lava flows from a volcano in Indonesia, an official said Sunday. Mount Sinabung on the western island of Sumatra sent hot rocks and ash up to 5,000 metres (16,000 feet) in the air "several times" on Saturday, National Disaster Mitigation Agency emergency response director Tri Budiarto told AFP. "So far, 25,516 people have been evacuated. There's nobody now within a five-kilometre (three-mile) radius of the crater. We are urging those living within seven kilometres southeast of the crater to move too," he added.Hot lava, which has been spewing from the volcano for the past two weeks, has flowed into a river and filled up valleys with pyroclastic material, he said.