South Carolina’s highest court, two days after pausing plans for a rare firing squad execution, announced Friday that it was putting another execution on hold as inmates challenge the constitutionality of the state’s capital punishment methods.

The temporary stay issued by the state Supreme Court means the planned May 13 execution of Brad Keith Sigmon won’t move forward for now.

The order comes after the court this week temporarily blocked the state from executing Richard Bernard Moore, whose scheduled April 29 execution would have marked the country’s first firing squad execution since 2010.

Moore and Sigmon were scheduled to be the first people executed in South Carolina after a 2021 law made electrocution the state’s default capital punishment method and also gave death row prisoners the option of execution by firing squad. Sigmon had not so far not chosen an execution method.

Lawyers for both men had sought stays, citing pending litigation in another court challenging the constitutionality of South Carolina’s execution methods.

The state Supreme Court has provided little explanation on exactly why the executions have been delayed and for how long they will be delayed, with justices indicating in both cases that more detailed orders would be forthcoming. The court did clarify Friday that prison officials shouldn’t move forward with the April 29 execution.

A state judge agreed last week to examine a legal challenge brought by Moore, Sigmon and two other death row inmates who have mostly exhausted their appeals. Their lawyers argue that both electrocution and the firing squad are “barbaric” methods of killing. The prisoners’ attorneys also want the judge to closely examine prisons officials’ claims that they can’t get hold of lethal injection drugs, citing executions by that method carried out by other states and the federal government in recent years.