INDONESIA is restricting shipping of coal to its neighbouring Philippines following a rise in hijackings of its ships by Filipino pirate groups linked to Islamist extremists.

The ports of Banjarmasin and Tarakan in Indonesia’s Kalimantan have stopped approving shipping permits to the Philippines, Reuters reports, citing a government official, amid fears of more attacks and kidnappings.

The measure might be adopted by other ports and it is yet not clear how will the Philippines’ coal needs be affected by the decision as Indonesia supplies 70 per cent of the country’s coal import needs.

At least 14 people are reported to have been kidnapped over the recent period by the Filipino pirates while transporting coal to the country.

At the end of March, an 10 Indonesians were kidnapped when a tug and barge were hijacked in the Philippines, followed by four more a couple of days after that.

The crews are being held for ransom by a group identified as the Islamic extremists, the Abu Sayyaf.

Based on the latest reports, the owner of the hijacked tugboat Brahma 12 has agreed to pay a ransom in the amount of IDR14.3 billion ($F2.06m) for the 10 kidnapped crew members, according to the Indonesia’s newspaper Jakarta Globe.

Reacting to the surge in pirate activity in the region, Indonesia, the Philippines and Malaysia are planning to conduct a joint naval patrol at the countries’ sea borders so as to prevent the situation from escalating further.