The Israel military said on Sunday that its fighter jets hit thousands of Hezbollah rocket launcher barrels in southern Lebanon that were aimed for immediate fire toward northern and central Israel.
More than 40 launch areas in Lebanon were struck during the early morning strikes, it said in a statement.
The Hezbollah group had earlier confirmed launching hundreds of rockets and drones against Israel in retaliation for the assassination of a senior commander in Beirut last month.
It said the barrage had completed "the first phase" of its response to the assassination of Fuad Shukr, but that the full response would take "some time".
Expectations of an escalation between the two sides had risen since a missile strike in the Israeli-occupied Golan Heights last month killed 12 youngsters, followed by the killing of Shukr in Beirut.
Foreign Minister Israel Katz said Israel would respond to developments on the ground but did not seek a full-scale war. Defence Minister Yoav Gallant said Israel would do whatever necessary to defend itself.
Gallant declared a state of emergency, and flights to and from Ben Gurion airport in Tel Aviv were suspended for around 90 minutes.
Meanwhile, Lebanon's state news agency said that an Israeli air strike on a car in the southern Lebanese town of Khiam on Sunday left one person dead.
Ukrainian President Volodymyr Zelenskyy marked Independence Day on Sunday alongside Canadian Prime Minister Mark Carney, who said Ukraine would receive more than C$1 billion ($723 million) in military aid from a previously announced package next month.
Israeli planes and tanks pounded the eastern and northern outskirts of Gaza City overnight Saturday to Sunday, destroying buildings and homes, residents said, as Israeli leaders vowed to press on with a planned offensive on the city.
The Pentagon is working on plans to deploy the US military to Chicago as President Donald Trump says he is cracking down on crime, homelessness and undocumented immigration, the Washington Post reported on Saturday.
Thousands of Australians joined pro-Palestinian rallies on Sunday, organisers said, amid strained relations between Israel and Australia following the centre-left government's decision to recognise a Palestinian state.
North Korean leader Kim Jong Un supervised the firing of new air defence missiles to test their combat capability, state media KCNA reported on Sunday.
Access to Dubai International Airport's Terminal 1 is set to improve under a new contract awarded by Dubai's Roads and Transport Authority (RTA) to widen the existing bridge from three to four lanes.
The UAE Cyber Security Council (CSC) has warned of the serious risks posed by using unsecured, free public Wi-Fi networks, revealing that more than 12,000 breaches have been recorded through such networks since the beginning of the year.