Israel estimates that 1,000-1,500 members of the Islamic Revolutionary Guard Corps (IRGC) and Iranian security forces have been killed in the strikes so far, an Israeli source told The Jerusalem Post.
Some estimates suggest much higher numbers, but the more conservative assessment speaks of over 1,000 fatalities among Iranian security forces. Since the start of Operation Roaring Lion and the joint American campaign Operation Epic Fury on Saturday, facilities belonging to the IRGC, the Basij militia, and government buildings have been hit.
Recent Tehran strike
On Monday, Israel carried out a significant strike in Tehran, focusing on internal security emergency bases, as well as Basij and IRGC installations.
As part of the strikes, the military hit over 10 headquarters of Iran's intelligence ministry and IRGC-Quds Force positions, the military confirmed.
The Israel Air Force also conducted strikes on surface-to-surface missile launchers, weapons production facilities, and other IRGC Air Force sites.
IDF Intelligence Chief: 'Sending clear message to enemies - no place we will not find them'
IDF Intelligence Directorate Chief Maj.-Gen. Shlomi Binder held an intelligence assessment on Monday with other senior Intelligence Directorate officers amid the ongoing strikes on Iran and retaliatory missile launches.
"We could tactically surprise them, beginning at an unexpected hour and catching our enemies mid-gatherings. In 40 seconds, we eliminated more than 40 of the most important people in Iran…and we are not finished," Binder said.
"Looking at the past two years of the war, I believe we are sending a very clear message to our enemies: there is no place where we will not find them," he added.
James Genn contributed to this report.