Reports emerged last week that Saudi Arabia intends to imminently execute more than 50 people on a single day for alleged terrorist crimes.

All the convictions were obtained through unfair trials marred by human and civil rights violations, including in some cases torture, forced confessions and lack of access to counsel. Each defendant was tried before the Specialized Criminal Court, a counterterrorism tribunal controlled by the Ministry of Interior that has few procedural safeguards and is often used to persecute political dissidents. Lawyers are generally prohibited from counseling their clients during interrogation and have limited participatory rights at trial. Prosecutors aren’t even required to disclose the charges and relevant evidence to defendants.

The problems aren’t just procedural. Saudi law criminalizes dissent and the expression of fundamental civil rights. Under an anti-terrorism law passed in 2014, for example, individuals may be executed for vague acts such as participating in or inciting protests, “contact or correspondence with any groups … or individuals hostile to the kingdom” or “calling for atheist thought.”

One of the defendants, Ali al-Nimr, was convicted of crimes such as “breaking allegiance with the ruler” and “going out to a number of marches, demonstrations and gathering against the state and repeating some chants against the state.” For these offenses, he has been sentenced to beheading and crucifixion, with his beheaded body to be put on public display as a warning to others.

Because of these procedural and legal abominations, the planned executions for these Shia activists must not proceed. They should be retried in public proceedings and afforded due process protections consistent with international law, which includes a ban on the death penalty for anyone under the age of 18.

This deafening silence is not lost on Saudi Arabia and has emboldened its impunity. In the wake of the Arab uprisings, the kingdom’s brutal campaign against its Shia minority and political opposition has deepened. Shias have limited access to government employment and public education, few rights under the criminal justice system and diminished religious rights. Those who protest this discrimination face arbitrary trial and the prospect of execution for terrorism. Consider that Saudi Arabia has not carried out a mass execution for terrorism-related offenses since 1980, a year after an armed group occupied the Grand Mosque of Mecca.

Despite its appalling human rights record, Saudi Arabia was awarded a seat on the U.N. Human Rights Council last year and this summer was selected to oversee an influential committee within the council that appoints officials to report on country-specific and thematic human rights challenges. Unsurprisingly, Saudi Arabia has used its newfound power to thwart an international inquiry into allegations that it committed war crimes in Yemen.