KUALA LUMPUR, March 6 -- Former Singapore-based banker Kevin Michael Swampillai said one of the suspicions raised by BSI Bank Singapore's compliance department was whether SRC International (Malaysia) Limited's (SRC BVI) board was truly informed of the millions being funnelled through the bank.

Swampillai was testifying as the first witness in SRC International Sdn Bhd's US$1.18 billion (RM5.58 billion) civil suit against former prime minister Datuk Seri Najib Razak.

Under cross-examination by Najib's counsel Harvinderjit Singh, Swampillai insisted he had escalated his suspicions to his superiors on the purportedly fraudulent transactions executed by SRC International (Malaysia) Limited totalling US$864.5 million between November 2011 a...