Two Philippine military officials said the militant group had demanded an undisclosed ransom amount from the boat’s owners. The officials declined to be identified because they are not authorised to speak to media.
The crew managed to call their employer to inform them of the hijacking, but the exact location of the incident remains unknown, officials said.
Indonesian officials said they were investigating the incident, without elaborating.
Abu Sayyaf, known for kidnappings, beheadings, bombings and extortion, is one of the most hardline Islamist militant groups in the Muslim south of the largely Christian Philippines.
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