Four detained Rio Tinto executives in China will find out on Monday if their pre-trial investigation will continue or if they will soon face court.
The four from Rio Tinto's Shanghai office have been held since July on charges of industrial espionage and bribery.
The ABC reports Liu Caikui, Ge Minqiang, Wang Yong and Stern Hu, an Australian citizen, will learn on Monday if investigators will obtain another extension or if the case will be put before a judge to decide if it should go to court.
Mr Hu was formally arrested on 11 August.
According to a Chinese newspaper report, another extension of the pre-trial investigation would mean at least one of the four would face more serious charges.