Finance Minister Lim Guan Eng will propose an open inquiry to investigate the alleged abuse of the GST Refund Trust Fund that he disclosed yesterday.

He said he will suggest it to Prime Minister Dr Mahathir Mohamad once preliminary internal investigations are completed.

Lim said former Treasury secretary-general Irwan Serigar must be aware that funds meant for the trust fund had been diverted to the Federal Consolidated Fund as revenue, but investigations are still determining to what extent the then finance minister I Najib Abdul Razak and then finance minister II Johari Abdul Ghani were aware or sanctioned it.