Malaysian Anti-Corruption Commission's (MACC) special operations division, which handled high-profile cases related to 1MDB and Felda, is allegedly being downsized.

It is understood the division better known as 'Bahagian Operasi Khas' in Bahasa Malaysia (BOK), was formed less than five years ago to investigate high-profile cases involving politicians, or bribes involving amounts over RM1 million.

A source familiar with the development indicated the division responsible for breaking several major cases in the past is being downsized or is facing restructuring.

It is not immediately known whether the move is sanctioned or supported by the new MACC chief commissioner, Dzulkifli Ahmad, the source said on condition of anonymity.

Among the division's cases include SRC International Sdn Bhd, a former 1MDB subsidiary now under the Finance Ministry.

Other cases include the Felda purchase of hotel property in London under present chairperson Isa Samad, and the water infrastructure corruption case in Sabah.

Felda has since been reported cleared of wrongdoing.

It is not immediately known whether the division's downsizing followed its move to investigate SRC International over the RM42 million which was apparently transferred into Prime Minister Najib Abdul Razak's personal account.

On Dec 5 last year, the MACC was reported to have questioned Najib for two and a half hours over the SRC case and another RM2.6 billion in the prime minister's accounts, claimed to be donations from the Middle East.

Attorney-general Mohamed Apandi Ali subsequently cleared Najib of any wrongdoing this January.

Whistleblower website Sarawak Report previously reported in August that a portion of the funds from SRC International had allegedly been spent by Najib on renovations to his Jalan Duta home and on anti-ageing hormones.

Malaysiakini has sent a text message to MACC chief Dzulkifli Ahmad and is awaiting his response, and is also attempting to reach the special operations division head Bahri Mohd Zin for comment.