Mohammad Bagher Zolghadr replaces Ali Larijani, who was killed last week in an Israeli strike. He has a history of expanding the Guards’ reach into Iran’s politics.

The Israeli military said it had killed the spokesman for Iran’s Islamic Revolutionary Guards Corps, and Iran warned that it could target American and Israeli military personnel.

One of Ayatollah Ali Khamenei’s closest confidants, Mr. Larijani emerged as the face of the government after Mr. Khamenei was killed.

The weeklong fight over Iran’s next leader pitted the Revolutionary Guards against moderates. The generals won, but only over spirited resistance.

As the conflict with Iran expands and intensifies, President Trump’s options — to fight on, or to move toward declaring victory and pulling back — both carry deeply problematic consequences.

The Israeli military said it killed the brother of Ayman Mohamad Ghazali in an airstrike in Lebanon a week before the attack on the synagogue.

Iran’s new supreme leader delivered a forceful message in his first public statement since succeeding his slain father, as the Israeli military bombarded Tehran and the Lebanese capital with strikes.

“We just want to be back in our homes,” said a Lebanese man who, like many others in the latest round of fighting, has to flee.

His father, Ayatollah Ali Khamenei, had turned what was traditionally a religious affairs office into a shadowy national security juggernaut.

Many in Iran feel helpless in the face of their entrenched system, and some are becoming increasingly embittered by the fierce American and Israeli bombardment.

Opponents of the government, however, worried the new supreme leader, a son of the recently killed Ayatollah Ali Khamenei, would rule with an iron fist like his father.

Iran named Mojtaba Khamenei, a son of Ayatollah Ali Khamenei, as his father’s successor. The Pentagon announced the death of a seventh U.S. service member.

Mojtaba Khamenei takes on a role that makes him not only Iran’s spiritual leader but also the highest authority in the land.

The selection of a son of Ayatollah Ali Khamenei, who was killed in a strike on his compound at the start of the war, could anger Iranians seeking change.

The succession of the slain leader’s son is seen as a signal of the Islamic republic’s defiance of Israel and the United States, and of continuity during crisis.

Iranian state media reported that the country’s top clerics have identified who will replace Ayatollah Ali Khamenei. They have not released his name.

The U.S. and Israel have pounded Iran’s leadership and undercut its defense capabilities, but President Trump has offered wildly different explanations for what he hopes to achieve.

Ali Larijani, the head of Iran’s Supreme National Security Council and a close confidant of Ayatollah Ali Khamenei, said Iran was determined to avenge the killing of the leader.

The waves of bombings reveal a broad effort to ravage the country’s leadership and security services.

China is learning lessons from the war in Iran. Chief among them, the United States may pose an even greater threat than Beijing thought.

If Mojtaba Khamenei is chosen by Iran’s senior clerics, it may signal a victory for hard-liners, an analyst said.

Soccer’s global governing body is grappling with a World Cup first: a tournament host going to war with a participating nation.

The Islamic Republic is aiming to draw out the conflict and broaden the fighting. That would force President Trump to risk more casualties and more political capital.

Beijing has condemned the U.S.-backed strikes on Iran, a close partner. Yet with trade talks looming, it is unlikely to risk a rupture with Washington.