The House is preparing to vote Thursday on a war powers resolution to halt President Donald Trump's attack on Iran, a sign of unease in Congress over the rapidly widening conflict that is reordering U.S. priorities at home and abroad.

It's the second vote in as many days, after the Senate defeated a similar measure along party lines. Lawmakers are confronting the sudden reality of representing the American people in wartime and all that entails — with lives lost, dollars spent and alliances tested by a president's unilateral decision to go to war with Iran.

The Canadian and Australian prime ministers on Thursday called for a de-escalation of the Iran war but added the Iranians must never gain a nuclear weapon.

Canada's Mark Carney and his Australian counterpart Anthony Albanese discussed the war during their meeting in Australia's capital, Canberra.

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.

Nearly 150 people were missing and several dead after an Iranian warship sank Wednesday off Sri Lanka following what crew members reported as an explosion, officials said.

Iran's Revolutionary Guards said Wednesday they had "complete control" of the crucial Strait of Hormuz and Israel launched fresh strikes on Iranian and Lebanese targets as the Middle East war continued into its fifth day.

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.

The U.S. military on Sunday said three service members have been killed and five seriously wounded in the operation against Iran -- the first casualties of any kind announced on the U.S. side.

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.