A German court has canceled another session in the trial of a 93-year-old former Auschwitz guard due to his poor health.

The Lueneburg state court said Wednesday's session in the trial of former SS sergeant Oskar Groening was called off, the fourth to be scrapped, and proceedings should resume June 9. The court already has limited sessions in Groening's trial, which opened in April, to three hours.

Groening is charged with 300,000 counts of accessory to murder on allegations he helped the death camp function by sorting cash and valuables seized from Jews.

On Tuesday, the court heard testimony from Angela Orosz-Richt, who was born at Auschwitz. She said she survived "because I have a mission to speak for those who can't speak," the news agency dpa reported.