Iran's armed forces threatened on Wednesday to target Israeli missions worldwide if Israel were to attack Tehran's mission in Lebanon, a military spokesman said.

The Israeli military is planning on at least "one or two" more weeks of strikes on Iran, Israeli media reported on Wednesday, the war's fifth day, while launching a fresh wave of attacks in Lebanon against Tehran-backed Hezbollah militants.

Iran announced that a state funeral for supreme leader Ayatollah Ali Khamenei, which had been planned for Wednesday evening in Tehran, was postponed "in anticipation of unprecedented turnout," state television reported.

"The farewell ceremony for the martyred Imam has been postponed. The new date will be announced later," Iranian television reported on Wednesday after Khamenei was killed in U.S.-Israeli strikes over the weekend.

The Israeli military said it killed a senior commander of Iran's elite Quds Force on Tuesday in a strike on Tehran, adding that he was responsible for its operations in Lebanon.

"Earlier today, the Israeli Air Force... struck and eliminated the temporary commander of the Lebanon Corps of the Iranian Quds Force, Daoud Ali Zadeh, in Tehran," a military statement said, adding that Ali Zadeh was "the highest-ranking Iranian commander responsible for Lebanon".

French President Emmanuel Macron on Tuesday ordered France’s nuclear-powered aircraft carrier to move from the Baltic Sea to the Mediterranean to help protect allied assets during the ongoing war in the Middle East.

Noting that the war had spread to Lebanon, Macron said the Iran-backed militant Hezbollah group made “the grave mistake of striking Israel” and putting the Lebanese people in danger but warned against Israel launching a ground operation.

French President Emmanuel Macron said Tuesday that the United States and Israel's military operations in Iran were conducted "outside international law", but placed primary blame on the Islamic republic.

"The United States of America and Israel decided to launch military operations, conducted outside international law, which we cannot approve of," said Macron.

US and Israeli strikes pummeled targets across Tehran on Tuesday, as President Donald Trump warned it was "too late" for Iran to seek talks to escape a war now in its fourth day.

Drones and missiles crashed into oil facilities and US embassies in the Gulf as the Islamic republic retaliated, and Israel pushed troops deeper into Lebanon to battle the Tehran-backed militia Hezbollah after it entered the fray.

New strikes were reported Tuesday across the Middle East, including Israeli bombardment on Lebanon and a drone attack on the U.S. embassy in Saudi Arabia's capital Riyadh.

The conflict started with U.S. and Israeli strikes on Iran over the weekend, which sparked retaliatory Iranian attacks across the region, and showed no sign of abating as it entered its fourth day.

The Palestinian Islamic Jihad’s armed wing said on Monday that its commander in Lebanon was killed in Israeli strikes on Beirut’s southern suburbs.

In a statement, the Quds Brigades said Adham Adnan al-Othman, the head of the armed wing in Lebanon, was killed "as a result of the treacherous Zionist aggression that targeted the southern suburbs of Beirut, at dawn on Monday".

The war launched by the United States and Israel against Iran spread across the Middle East and beyond on Monday, with Lebanon's Hezbollah entering the fray and a British air base in Cyprus targeted.