One of four men arrested in Khartoum since December 2015 has been released, but three others continue to face charges which could lead to the death penalty or life imprisonment if found guilty.
Kuwa Shamal, a Sudanese church leader, was released after a hearing in Khartoum during which the judge said that there was insufficient evidence to charge him.
However, the judge ruled there was sufficient evidence to proceed with the trials of fellow Sudan Church of Christ leader Hassan Taour, Abdulmonaim Abdumawla and Czech aid worker Petr Jasek.
The hearing is scheduled for today, when the defence lawyers would present their case. Reportedly, Jasek would be tried for waging war against the state, violating restrictions in military areas, spreading rumours to defame the state, espionage, and inciting strife between communities, while Taour and Abdumawla will only be tried for the last two of these charges.