Israel and Lebanon's Hezbollah on Sunday launched their heaviest exchange of fire after months of strikes and counterstrikes, raising fears of an all-out war that could potentially draw in the United States, Iran and militant groups across the region. By mid-morning, it appeared the exchange of fire had ended, with both sides saying they had only aimed at military targets. Lebanese authorities said the Israeli strikes killed three people, while there were no reports of casualties on the Israeli side.

The situation remained tense. Here's a look at where things stand: Israel says around 100 warplanes launched airstrikes targeting thousands of rocket launchers across southern Lebanon to thwart an imminent Hezbollah attack. Hezbollah then said it launched hundreds of rockets and drones aimed at military bases and missile defense positions in northern Israel and the Israeli-annexed Golan Heights.

Hezbollah called the attack an initial response to the targeted killing of one of its founding members and top commanders, Fouad Shukur , in an Israeli airstrike in Beirut last month. It said the first stage of the attack, which would allow it to launch assaults deeper into Israel, was completed. It also said its military operations Sunday were concluded.

It denied Israel's claims to have thwarted the attack. At least three people were killed, including a fighter with the Hezbollah-allied Amal group, and two were wounded in the strikes on Lebanon. Lt.

Col. Nadav Shoshani, an Israeli milit.