Rejeki Baru speed boat, heading to Tanjung Selor of Bulungan district, sank after sailing 1 km off the coast of Pelabuhan Tengkayu of Tarakan town, spokesman of the national search and rescue office Marsudi said.
Torrential rains have lashed northeastern Japan over the weekend, with over 300 millimeters of rainfall observed at multiple areas in Akita prefecture through Sunday, according to the Japan Meteorological Agency (JMA).
"Now we can say exactly that five people, including four children, have died in the accident. According to preliminary reports, 13 more have been injured. More information will follow," the press service said.