The case against the Thulsie twins has been postponed to April to allow the State more time to investigate allegations of terrorism.
Brandon-lee and Tony-lee Thulsie were arrested last year after the Hawks raided their homes in Johannesburg and accused them of planning to attack Jewish and American institutions.
Their lawyer has been fighting to have the case struck off the roll, claiming that they were unlawfully arrested.
The pair will remain in custody until April, when their case is due back in court.
The State applied for a three-month postponement in order to collect evidence from other countries‚ including the US‚ Britain‚ Kenya‚ Syria and Turkey.
The investigating officer has also recently found that they were active on social media prior to their arrest, discussing matters which could incriminate them.
Prosecutor Chris MacAdam argued that a further postponement cannot violate their rights because the twins voluntarily abandoned their bail applications.
Defence lawyer Anneline van den Heever has argued that the matter should be struck off the roll due to the manner in which the twins were arrested and because of a lack of evidence.