Israel confirmed killing IRGC intelligence chief Mohammad Kazemi, his deputy, and a third general in airstrikes under Operation Rising Lion.
The strikes also reportedly killed 14 Iranian nuclear scientists.
Iran retaliated with missile and drone attacks.
Netanyahu called it a major blow; Iran vowed revenge.
Hezbollah threatened Israel, while the UN and U.S. urged calm.
Experts warn of a wider Middle East war amid soaring regional tensions.
