Mohsen Khazaei died in the village of Minyan outside the northern city, one of two areas which Syrian government forces had recaptured from rebel fighters, it said.
IRIB said that a cameraman was also wounded in what it described as a "mortar attack launched by terrorists", a term designating insurgents fighting the Syrian regime which Iran supports.
Earlier in the day, the state television had broadcast footage showing Khazaei in Minyan.