Malaysian Anti-Corruption Commission (MACC) chief commissioner Abu Kassim Mohamed has vowed to get to the bottom of Prime Minister Najib Abdul Razak’s case involving billions of ringgit found in his private bank account.

In an interview with Oriental Daily , Abu Kassim revealed that pursuing the case had been a great challenge as this was the first time an investigation was being carried out on a serving prime minister.

"Nobody can influence the course of our investigation - this was what I had promised to the (MACC) officers at a meeting," he pledged...