The oil traders received notices earlier this month, asking them to assist the office of Indonesia’s attorney general by answering questions on overall governance and past transactions, according to several people who were sent or saw the invitation. They asked not to be identified as they are not authorised to speak publicly.
Earlier communication had sought to invite traders to Jakarta, but the people said the latest missive, sent from a Pertamina email address, specified interviews would be conducted at Singapore’s Corrupt Practices Investigation Bureau, without confirming dates. There is no suggestion that those called to assist have been accused of any wrongdoing.
Indonesian authorities arrested executives from Pertamina subsidiaries in February on accusations that they pushed refiners to import marked-up crude and oil products from abroad, causing state losses. More executives, including Nicke Widyawati, the company’s former chief executive, have since been questioned in a widening investigation.

A PT Pertamina worker climbs on a gauge at a crude oil well. Indonesia relies on energy imports, with Singaporean firms frequently taking part in Pertamina’s petrol and crude oil tenders. Photo: Reuters
The attorney general’s office in Jakarta confirmed that several Singapore-based companies had been summoned, but said no interviews had yet taken place.