An MACC source said the accounts belonged to the operators of a petrol station and two enforcement officers, Harian Metro reported.

The source said the accounts were frozen following the arrest of two siblings who ran the petrol station, an assistant enforcement officer and the director of an enforcement agency.

“No new arrests or seizures have been made for now,” he was quoted as saying, adding that the siblings are out on bail after their remand order expired.

MACC special operations division senior director Azmi Kamaruzaman reportedly confirmed the freezing of the bank accounts.

Previously, a director of an enforcement agency was reported to have been arrested in Kuching on Tuesday for allegedly receiving kickbacks for not acting on diesel smuggling in Sibu.

It followed a raid on an oil storage depot for fishermen in Sungai Bidut, Sibu, last Sunday, which saw MACC arresting five people and seizing 1.6 million litres of diesel.

MACC chief Azam Baki had said the syndicate smuggled subsidised diesel overseas and paid off enforcement officers to keep their operation going.

Azam also said the syndicate had been operating since 2012 and was believed to have pocketed RM400 million since then.