At least 15 people have died in a ferry accident off the coast of the Indonesian island of Sulawesi. Local rescue services said 19 others were still missing at sea.

The ferry, with around 40 people on board, was traveling in Buton Tengah province when it capsized around midnight. Six passengers were rescued and are being treated in hospital.

The search teams used numerous boats and underwater cameras to find the missing persons. The cause of the accident was still unclear. According to the authorities, the weather was good and the waves were moderate.

Shipwrecks are common in Southeast Asian Indonesia. In the country of around 17,000 islands, most people rely on ferries as a method of transportation. However, the safety standards are often not met, and the ferries are often overcrowded.