Over 1,000 people in Lebanon have been killed in the last two weeks.
Israel's Lebanon operation continues as leaders consider their response to Iran's long-range attack on Tuesday, in which hundreds of missiles were fired into the country, according to Danny Danon, Israel's ambassador to the United Nations.
Iran said the unprecedented attack was retaliation for a wave of assassinations carried out by Israel over the last several weeks targeting Hezbollah, including leader Hassan Nasrallah.
Most of the missiles were intercepted, but "several hits were identified, and the damage is being assessed," an Israeli security official said.
Tune in to ABC News Live at 4 p.m. and 8:30 p.m. on Monday, Oct. 7, for "Oct 7th: Race to Survive" -- special coverage of the anniversary of the conflict. Veteran correspondent Matt Gutman highlights voices of Israelis and Palestinians impacted by the war and the ongoing humanitarian crisis in Gaza.
Several flights near Iran are diverting ahead of expected missile launches at targets in Israel.
Several Lufthansa flights and one Swiss Air flight were diverted back to Frankfurt, Germany, and Turkey as they approached Iranian air space.
-ABC News' Sam Sweeney
Israel said missiles have been launched from Iran toward Israel.
Sirens are sounding across the country.
Iran is expected to launch 240 to 250 missiles in two waves at four targets in Israel, including Mossad headquarters and three air bases, according to an Israeli source and a senior U.S. administration official.
Israel is not expected to launch a preemptive strike, according to the U.S. administration official. It should take the missiles less than 15 minutes to reach targets once launched.
The U.S. and Israel have all defenses activated, and Israel will “absolutely “ retaliate after it happens," the official said.
The total number of ballistic missiles is about double the number launched by Iran in April -- 99% of which were intercepted.
-ABC News' Martha Raddatz
The Israel Defense Forces issued a warning for residents of the "Dan area," referring to the greater Tel Aviv area, to stay "near a shelter until further notice."
Sirens sounded in central Israel, the IDF said in a second statement, after issuing the warning to stay in shelters. The sirens sounding in central Israel were due to launches from Lebanon, the IDF told ABC News.
"From this moment, Israelis living in central Israel are advised to stay by their safe rooms. Enter them during sirens and stay there until further notice," IDF spokesperson Daniel Hagari said in Hebrew.
-ABC News' Dana Savir, Anna Burd and Jordana Miller
