(CNN) A 93-year-old former guard at a Nazi concentration camp will go on trial in Germany on Thursday on the charge of being an accessory to thousands of murders.

The man, known as "Bruno D," will face a Hamburg court over the deaths of 5,230 people after he joined the SS as a guard between August 1944 and April 1945.

According to the indictment , the defendant knowingly supported the "insidious and cruel killing" at Stutthof concentration camp , in what is now modern-day Poland.

The former Nazi concentration camp Stutthof in Sztutowo, northern Poland.

Prisoners in Stutthof were killed by being shot in the back of the neck, poisoned with Zyklon B gas, and denied food and medicine, court documents allege. The defendant could be considered complicit in the crimes because he prevented the escape, revolt and rescue of the prisoners, a spokesperson for Hamburg's district court told CNN.

Despite his advanced age, the defendant is being tried in a youth court because he was 17 years old when he joined the SS as a guard at the camp, according to a press release from Hamburg's district court.

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