Behzad Khosravi, from the Iranian city of Saqqez, was arrested last week and sent to Iran, the sources told Tehran-based Tasnim news agency.
Khosravi, 35, is reportedly in custody in Iranโs intelligence detention center in Sanandaj, the provincial capital of Kordestan Province.
PDKI, an armed leftist separatist movement of Kurds which calls for either separatism in Iran or a federal system, is banned in Iran and has moved to northern Iraq.
Last year, Iran and Iraq reached an agreement to disarm and expel Kurdish terrorist groups from the semi-autonomous Kurdistan region in northern Iraq.
Iran has even warned it is ready to take action to eliminate the threat posed by anti-Iran terrorist groups based in Iraqโs Kurdistan region.