Sy Hersh is one of the best investigative journalist around. But under the comments section of the New Yorker story it was implied that... ' this story has resorted to sources such as Masoud Khodabandeh, a notorious agent of the Iranian regime's Ministry of Intelligence in Europe.' It certainly wouldn't be beyond the Iranians to furnish misinformation. And Tehran has reported this exact claim. But it's difficult to imagine Sy Hersh would corroborate this kind of allegation. And based on previous performance... Sy Hersh's information is usually very reliable.
Islamic State destroys part of Syria's Temple of Bel, monitoring group says (Reuters)
from the article: Report: U.S., Israel helped train Iranian dissidents