Washington Post: Iran has arrested four suspects in the killing of a prosecutor in an attack which a judiciary official said may have been carried out by Kurdish guerrillas, Iranian media reported on Tuesday.

“So far, no group has claimed responsibility for this terrorist act,” provincial judiciary chief Mohammad Ali Mousavi was quoted as saying by ISNA news agency.

“But in view of the threats and plans the PJAK group had announced previously, it is probable that this group is involved in the assassination,” he said.

Iranian security forces often clash with guerrillas from the Party of Free Life of Kurdistan (PJAK), an offshoot of the Kurdistan Workers Party (PKK) which took up arms in 1984 for an ethnic homeland in southeast Turkey.

NY Times: An Iranian official says Kurdish rebels may have been involved in the assassination of a court prosecutor in the country’s northwest.  Gunmen fatally shot Vali Hajgholizadeh outside his home late Monday in the town of Khoy, near the Turkish border.