Hezbollah said it launched a salvo of missiles at an Israeli military base on Saturday, as Israeli troops battled militants in Lebanon and Gaza on Yom Kippur, the holiest day in the Jewish calendar.
Cities around Israel were quiet with markets closed, flights stopped and public transport halted as observant Jews fasted and prayed on the Day of Atonement.
But with Israel at war against Hezbollah and Hamas, troops remained engaged in combat on the northern and southern frontiers amid a firestorm of criticism over the wounding of four U.N. peacekeepers in Lebanon.
Hezbollah, which has lost its leader and a long list of key commanders to Israeli strikes since the start of the war in Lebanon, on Saturday said it struck an army base with missiles to the south of the city of Haifa.
Hezbollah fighters were "targeting the explosives factory there with a salvo of... missiles," the group said in a statement.
Air raid sirens sounded on Saturday in northern Israel, with the Israeli military saying it had intercepted a projectile launched from Lebanon.
In the hours ahead of Yom Kippur, Israel faced severe diplomatic backlash over what it said was a "hit" on a United Nations peacekeeping position in Lebanon.
Two Sri Lankan peacekeepers were hurt in the second such incident in two days, the UNIFIL mission said Friday.
The military said Israeli soldiers had responded with fire to "an immediate threat" around 50 meters (yards) from the UNIFIL post.