The Prosecution renewed on Thursday the detention of three suspects, accused of calling for protests on 11 November, to Friday, when they will be interrogated.
They are facing charges of joining an illegal group, calling for protests, and planning to topple the regime.
State media reported that more suspects are expected to be arrested in the same case.
Several arrests have taken place in recent days, orchestrated by the National Security Apparatus, who is accusing suspects of planning for a “popular uprising” to protest the sharp increase in the cost of food products.