JAKARTA, April 29 (Xinhua) -- Waters in two rivers in Mandailing Natal of North Sumatra suddenly overflowed on Sunday after rains, triggering flashfloods that wounded 10 people and pushed nearly 1,000 others escaping homes, official said on Monday.
"Six people get serious wounds and four others minor injury. As many as 810 people have escaped their homes after the flashfloods at 18:30 local time Sunday," Sutopo Purwo Nugroho told Xinhua over phone.
Scores of houses were swept away by the floods, he said.
Most of the internally displaced persons took shelters in their relatives houses and other buildings, Alamsyah, senior official at North Sumatra disaster management and mitigation agency said.
"Two rivers, Aek Mata and Aek Ranto rivers, overflowed on Sunday after rains," he told Xinhua by phone from North Sumatra.
Sutopo said that military and volunteers were conducting evacuation and giving help to the victims of the floods.
The assessment over the impact of the flashflood was underway now, he said.
In February 2013, flashfloods in Mandailing Natalkilled scores of people and seriously damaged infrastructure facilities.
Indonesia has been frequently hit by floods when heavy rain occurs.