The Israeli military said on Tuesday that missiles had been launched from Iran towards Israel, and that its home front command had provided life-saving guidelines to people in various parts of the country.
Earlier, the military had announced that any ballistic missile strike from Iran was expected to be widespread and told the public to shelter in safe rooms in the event of an attack.
The Israeli army also said Israel's airspace was closed following the Iranian attack.
The firing of missiles came after Israeli troops launched ground raids into Lebanon, in the biggest escalation of regional warfare since fighting erupted in Gaza a year ago.
Iran has vowed to retaliate following attacks that killed the top leadership of its Hezbollah allies in Lebanon.
Iran's Revolutionary Guards said the country had launched tens of missiles at Israel, and that if Israel retaliated, Tehran's response would be more crushing.
In Washington, President Joe Biden said the United States was prepared to help Israel defend itself.
Meanwhile, four people were killed and seven wounded in a shooting attack in the Jaffa neighbourhood of Tel Aviv on Tuesday. Israeli police said the two shooters had been "neutralised" and the situation was under control.
US President Donald Trump has expanded a list of countries subject to a full travel ban on Tuesday, prohibiting citizens from an additional seven countries, including passports from Syria and Palestine, from entering the United States.
The alleged gunman shot dead by police during Sunday's attack on Australia's Bondi beach was originally from the southern Indian city of Hyderabad and his family did not know about his 'radical mindset', Indian police said on Tuesday.
US President Donald Trump has ordered on Tuesday a "blockade" of all sanctioned oil tankers entering and leaving Venezuela, in Washington's latest move to increase pressure on Nicolas Maduro's government, targeting its main source of income.
The Israeli military have shot dead a 16-year-old Palestinian during a raid on the town of Tuqu' on Monday, the Palestinian health ministry said, the latest deadly incident in a recent surge of violence in the Israeli-occupied West Bank.
US President Donald Trump has sued the BBC on Monday for defamation over edited clips of a speech that made it appear he directed supporters to storm the US Capitol, opening an international front in his fight against media coverage he deems untrue or unfair.