She said the flooding began Monday evening and was triggered by heavy rains that caused three rivers to overflow.
Mud and other materials carried by the floodwaters covered roads and thousands of houses, she said.
National Disaster Mitigation Agency spokesman Raditya Jati said the flood affected more than 4,000 residents of six sub districts in North Luwu.
“The provincial road is covered in mud and that blocks access to the main command post and the affected areas,” Jati said.
Heavy rains cause frequent landslides and flash floods in Indonesia, where millions of people live in mountainous areas or near flood plains.
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