Abdullah K was arrested in June alongside his three brothers on suspicion of membership in the al-Nusra Front, al-Qaeda’s branch in Syria that later split from the group and changed its name to Jabhat Fatah al-Sham.
The ministry said there had been no indication that Abdullah K had been suicidal, and that he had seemed “stable’’ during an assessment by a psychologist on Aug. 25.
The man and his brothers are accused of fighting Syrian forces and members of the Kurdish YPG militia in the northern city of Ras al-Ayn from 2012 onwards.