DUBAI, United Arab Emirates (AP) — Israel killed two senior Iranian security officials in a major blow to the Islamic Republic’s leadership as it faces its greatest test in decades.

Ali Larijani, secretary of Iran’s Supreme National Security Council, was considered one of the most powerful figures in the country since Supreme Leader Ayatollah Ali Khamenei was killed in an airstrike on the first day of the war. Gen. Gholam Reza Soleimani was the head of the Rev...