The Indonesian businessman is believed to be in Malaysia, Harian Metro reported.

“The immigration department will give its full cooperation if Indonesia makes an official request,” director-general Zakaria Shaaban was quoted as saying today.

Yesterday, Indonesian weekly Tempo reported that the republic’s directorate general of immigration at the law and human rights ministry is coordinating with immigration officials in Malaysia to confirm Riza’s whereabouts.

Acting Indonesian immigration director-general Yuldi Yusman said immigration records show Riza has been in Malaysia since Feb 6 after departing from Soekarno-Hatta Airport.

On Saturday, The Jakarta Post reported that Riza was named as a suspect in a corruption case linked to fuel imports at subsidiaries of Pertamina, the state-owned oil and gas giant, which registered losses amounting to trillions of rupiah.

Indonesian investigators said they found enough evidence to name the businessman a suspect in a probe that has seen seven people arrested so far, including Riza’s son, Kerry Adrianto.

It was previously reported that the director of investigation at the attorney-general’s office in Indonesia, Abdul Qohar, said Riza could be in Singapore.

However, Yuldi confirmed yesterday that Riza is not currently in Singapore.