Shademani, as Khatam al-Anbiya chief was Iran's "War-Time Chief of Staff, the most senior military commander, and the closest figure to Iranian Supreme Leader Ali Khamenei," the IDF stated.
Israel is "doing what we need to do," Netanyahu said when asked if Israel would target Khamenei.
US law enforcement officials said on Thursday they were looking into the post depicting an image of "8647," which some Trump supporters interpreted as a threat against him.
Clashes erupted between the 444th Brigade and the Stability Support Apparatus, two of the most powerful Tripoli militias.
The opposition head laid the blame at the feet of the government, and called on Prime Minister Benjamin Netanyahu to stop the incitement.
The National Archives released over 10,000 pages of records in connection with the Kennedy's killing, according to details on its website on Friday.
IRGC officials met with known drug trafficker Agil Aslanov last fall, the Washington Post reported on Saturday. The officials gave Aslanov a photo of the rabbi and instructions on the killing.
Prosecutors said Rafat Amirov and Polad Omarov were to be paid $500,000 by Iran for the assassination.
Trump has also promised to release documents on the assassinations of civil rights leader Martin Luther King Jr. and Senator Robert Kennedy, both of whom were killed in 1968.