JAKARTA, July 25 (Xinhua) -- A speedboat with 47 people on board capsized in waters off North Kalimantan province in central Indonesia on Tuesday, a spokesman of the national search and rescue office said.

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.

"Our personnel are undertaking a search and rescue operation for the victims of the incident," he told Xinhua by phone.

Rescuers from the navy and water police also took part in the rescue operation.