U.S. President Donald Trump on Sunday said he would "be talking" to Iranian leaders but was vague on the timing and noted that much of the country's leadership was dead.

Cheers in Tehran. Retaliation and mourning by Iran. Protests in some parts of the Muslim world, celebrations in others.

At least nine people were killed during pro-Iran protests at the United States consulate in the Pakistan megacity of Karachi on Sunday, according to a hospital toll seen by AFP.

Iranian strikes and drone attacks targeted northern Iraq, where U.S. troops are deployed, as furious protests raged in Baghdad on Sunday over the killing of Iran's supreme leader Ayatollah Ali Khamenei.

France can only "be satisfied" with the killing of Iran's supreme leader Ayatollah Ali Khamenei in U.S.-Israeli strikes, said government spokeswoman Maud Bregeon on Sunday.

Hezbollah vowed Sunday to confront the United States and Israel over their strikes on the group's key backer Iran.

"We will undertake our duty of confronting the aggression," Hezbollah chief Sheikh Naim Qassem said in a statement, adding that his group would not leave "the field of honor and resistance".

Britain's defense secretary said Sunday that "Iranian indiscriminate retaliatory attacks" to U.S.-Israeli strikes included "two ballistic missiles fired in the direction of Cyprus", but which were likely not "targeted" at the Mediterranean island.

Israel's military said Sunday that it was "not aware" of any U.S. or Israeli strike on a school in Iran that Iranian authorities say was hit the previous day, killing over 100 people.

The Israeli military on Sunday said it had destroyed roughly half of Iran's missile stockpiles, adding the Islamic republic had been producing dozens of surface-to-surface missiles each month.

Iranian state television confirmed the death of its supreme leader Ayatollah Ali Khamenei and launched a fresh wave of attacks on Sunday as Israel hit back at the capital Tehran.