Torrential rains triggered the floods at around 6 p.m. in several villages in Jayapura district on Saturday.
Over 3,000 people have been forced to flee home and take shelter elsewhere as dozens of houses, buildings, bridges and other infrastructure were damaged, Simbolon said.
Landslides upstream had accumulated soils at the river, hampering water flow. The flash floods occurred when that soil collapsed, National Disaster Management Agency Sutopo Purwo Nugroho said.
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