The National Union of Flight Attendants Malaysia (Nufam) has cautioned Finance Minister Zafrul Abdul Aziz that he should investigate the source of the national airline carrier's huge losses before more funds are pumped in.

"While Nufam applauds the government's move to help the ailing national carrier out of its crisis, we do not want the airline to abuse taxpayers money since Malaysia Airlines Berhad (MAS) has already lost billions of ringgit pre-Covid-19.

"We have raised these issues before with the last government and we are...