Indonesia’s supreme court has rejected most of an appeal by Temasek Holdings against a lower court verdict that Singapore’s state-owned investment company violated anti-monopoly laws through its indirect ownership of stakes in the country’s biggest two mobile phone companies.

Djoko Sarwoko, a court spokesman, said that the substantive aspects of the district court’s ruling had been upheld but that some of the subsidiary parts had been amended. Full details are due to be announced at a press conference later on Friday.