German authorities have arrested a Libyan war crimes suspect accused of being a senior official for a notorious prison where inmates were routinely tortured and sometimes sexually abused, the International Criminal Court said on Friday.

Khaled Mohamed Ali Al Hishri was arrested on Wednesday, German authorities said. The ICC said he would remain in the custody of German authorities, pending the completion of national proceedings.

He is accused of war crimes and crimes against humanity including murder, torture and rape from February 2015 to early 2020.