He arrived at about 9.30am, entering the building through the back entrance.

Former chief secretary to the government Ali Hamsa was earlier seen at the MACC headquarters as well, but it is not known why he was there.

It was reported yesterday that Arul, along with former prime minister Najib Razak, would be charged over the alleged tampering with the audit report on the scandal-plagued investment arm.

Najib is expected to be prosecuted for using his office for gratification, while Arul will reportedly be charged with abetting the former prime minister who was arrested by MACC yesterday.

Two weeks ago, Auditor-General Madinah Mohamad said in a statement that amendments were made to the audit report on the investment arm, on orders from Najib and his former principal private secretary Shukry Salleh.

In the statement on Nov 24, Madinah also said mention of businessman Low Taek Jho’s presence at a 1MDB board meeting and a paragraph containing two versions of the 1MDB financial statement for the year ended 2014 were removed.

She said Ali, former auditor-general Ambrin Buang, and Arul were also involved.

Last Thursday, MACC officers grilled Najib for several hours over the matter. Arul was also interrogated earlier.

Ambrin and former MACC chief Dzulkifli Ahmad were also called in for questioning over the report.