Inside the operation that took down Hezbollah's Fuad Shukr 

Hezbollah's military commander, Fuad Shukr, was assassinated after a breach of the terror group's communications, according to a report by the Wall Street Journal on Sunday.

Citing a source within the Iran-backed group, the report detailed how Israel claimed responsibility for the targeted killing last month, which has since prompted threats of retaliation from Hezbollah.

According to the report, Shukr received a call instructing him to return to his apartment five floors up in his Beirut building. At around 7 p.m., Israeli munitions struck the apartment and the three floors beneath it, killing Shukr, his wife, two other women, and two children. The call that led Shukr back to his apartment likely came from someone who had infiltrated Hezbollah’s internal communications network.

The newspaper described Shukr as a "ghost" who was rarely seen in public. To avoid exposure to attacks, he lived and worked in the same building located in Beirut's Dahya quarter, a Hezbollah stronghold. His identity was so closely guarded that, following his assassination, Lebanese media outlets mistakenly published a wrong photograph of him.