Hezbollah claimed early on Sunday to have launched more than 320 rockets toward 11 military locations within Israel and Golan Heights.

The "enemy sites" that had been targeted were detailed in a statement. They included military bases in Meron, Ein Zeytim and Al-Sahl.

Barracks in Naveh Ziv, Ramot Naftali and Zaoura were also among the sites targeted, Hezbollah said.

The group described those launches as a "first stage," saying they were "targeting Israeli barracks and sites to facilitate the passage of offensive drones towards their desired target deep inside" Israel.

-ABC News' Will Gretsky and Kevin Shalvey

President Joe Biden "is closely monitoring events in Israel and Lebanon. He has been engaged with his national security team throughout the evening," White House National Security Council spokesman Sean Savett said.

"At his direction, senior U.S. officials have been communicating continuously with their Israeli counterparts. We will keep supporting Israel’s right to defend itself, and we will keep working for regional stability," Savett said.

ABC News' Anne Flaherty

Tel Aviv Ben Gurion International Airport has temporarily closed Sunday morning, officials said.

"Due to the security situation, the departures this morning from Tel Aviv will be delayed, and will not take off in the next few hours. Flights en route to Israel will be directed to land at alternative airports in the region," Israel Airports Authority said in a statement.

ABC News’ Dana Savir

Israel launched a preemptive strike on Hezbollah in Lebanon, Israel Defense Forces spokesman Daniel Hagari said in a video on X.

"A short while ago, the IDF identified the Hezbollah terrorist organization preparing to fire missiles and rockets toward Israeli territory," Hagari said.

"In a self-defense act to remove these threats, the IDF is striking terror targets in Lebanon, from which Hezbollah was planning to launch their attacks on Israeli civilians," Hagari continued.