An anti-corruption campaigner has urged Malaysia to tighten its curbs against money-laundering, following allegations that RM2.6 billion had been deposited in Prime Minister Najib Abdul Razak personal bank accounts.

“If the allegations are true that the prime minister received US$700 million in his personal accounts, this raises serious questions about what due diligence checks the banks did,” Global Witness senior campaigner Stuart McWilliam said yesterday.