Lebanon - Israeli air strikes on Lebanon killed at least 492 people on Monday, including 35 children, the health ministry said, marking the deadliest day of cross-border violence since the Gaza war began.
Arab states strongly condemned Israel for the escalating hostilities with Hezbollah, which have intensified to levels unseen in nearly a year.
Israel said it killed a "large number" of Hezbollah fighters when it hit about 1,600 sites in southern and eastern Lebanon, including a "targeted strike" in Beirut in what the Israeli military called "Operation Northern Arrows".
Hezbollah said Ali Karake, its third-in-command, was alive and had moved to safety after a source said the strike on the capital targeted him. The group said early Tuesday it had launched "volleys" of missiles at Israeli military sites after state media reported new raids in eastern Lebanon.
People in Israel's coastal city of Haifa were seen running for cover on Monday when air raid sirens sounded. Lebanon's health ministry said the strikes killed 492 people, including 35 children and 58 women, and wounded 1,645 others.
Health Minister Firass Abiad said "thousands of families" had been displaced. Explosions near the ancient city of Baalbek in eastern Lebanon sent smoke billowing into the sky. "We sleep and wake up to bombardment... that's what our life has become," said Wafaa Ismail, 60, a housewife from the southern village of Zawtar.
Global powers urged Israel and Hezbollah to step back from the brink of all-out war, as the violence shifted from Israel's southern border with Gaza to its northern frontier with Lebanon.
France and Egypt called on the United Nations Security Council to intervene, while Iraq requested an urgent meeting of Arab states on the sidelines of the UN General Assembly in New York.
Israeli army chief Herzi Halevi said the strikes hit combat infrastructure Hezbollah had been building for two decades.
Israeli Defence Minister Yoav Gallant called Monday "a significant peak" in the operation. "This is the most difficult week for Hezbollah since its establishment -- the results speak for themselves," he said.
"Entire units were taken out of battle as a result of the activities conducted at the beginning of the week in which numerous terrorists were injured."
Prime Minister Benjamin Netanyahu said Israel was acting to change the "security balance" in the north.
Hezbollah said it was in a "new phase" of confrontation.
The group said it launched rockets at Israeli military sites near Haifa and two bases in retaliation for Israeli strikes on the south and the Bekaa.
The attack came after an Israeli strike on southern Beirut on Friday killed its elite Radwan Force commander, Ibrahim Aqil, and coordinated communications device blasts that Hezbollah blamed on Israel killed 39 people and wounded almost 3,000 on Tuesday and Wednesday.
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