Former Goldman Sachs banker Tim Leissner has revealed that two private secretaries of then-prime minister Najib Abdul Razak were involved in facilitating the third bond issuance worth US$3 billion for 1MDB.

Leissner explained the third bond relied on support - specifically in the form of a letter of support - from the Malaysian government to raise US$3 billion instead of a guarantee from the International Petroleum Investment Company (Ipic) which had been the case for the first two bonds.

The first bond was called...