T

he Corruption Eradication Commission (KPK) is intensifying its investigation into a graft case pertaining to the construction of a coal-powered energy plant in Riau.

KPK spokesman Febri Diansyah said investigators had searched the offices of state-owned electricity company PLN and one of its subsidiaries, PT Pembangkitan Jawa Bali (PJB), in Jakarta.

“The search was conducted at the office of PJB’s president director and other directors,” Febri said on Monday.

Tempo.co reported that the search was completed on Tuesday morning and investigators were seen exiting the building carrying boxes and suitcases.

PLN president director Sofyan Basir confirmed that the KPK had searched a number of rooms, including his office, at PLN headquarters.

“Every division room connected to the project was searched. I don’t know what was taken,” Sofyan said on Monday night.

The search was conducted after investigators raided his house in South Jakarta on Sunday, during which the KPK seized a number of documents related to the power plant construction.

“PJB has no role [in the project]. PLN and its subsidiary, God willing, are not involved in the case,” Sofyan said.

Previously, the KPK named two suspects in the case, namely Golkar lawmaker Eni Saragih and businessman Johannes Budisutrisno Kotjo. They are suspected of being involved in bribery worth at least Rp 4.8 billion (US$333,629) in connection with a contract on the Riau-1 power plant construction.