A German man accused of spearheading a far-right group that shared pro-Nazi and anti-Semitic material online has been extradited to his home country from the Netherlands, German federal prosecutors confirmed Thursday. 

Fadi J. was arrested in Heerlen, in the Netherlands, near the German border in July. Authorities have withheld his last name in line with German privacy laws. 

J. is accused of co-founding the "Goyim Party Germany" group in 2016. Prosecutors say the group’s website promoted material denying the Holocaust and praising crimes committed by the Nazi regime, news agency AP reported. 

Read more: Germany and right-wing extremism: The new dimension of terrorism

The site also featured "deeply disparaging anti-Semitic propaganda'' that included a call to kill Jews. 

The accused appeared Wednesday evening before a Federal Court of Justice judge who had issued the warrant and ordered he be detained ahead of his trial, prosecutors said.

Half a dozen more suspects

A second suspect was arrested in Berlin at the same time J. was apprehended in the Netherlands, AP said. Suspect Marcus B. is accused of joining the group in 2018. 

At least six other suspects are also being investigated.