The Lebanese militant group Hezbollah issued a threat to Israel and the United States on Sunday, suggesting that it could get further involved in support of Hamas as the war escalates. Hamas, a militant Palestinian group which the U.S. designates as a terrorist organization, launched a surprise attack on Israel on Saturday. The violence has thus far left hundreds of Israelis and Palestinians dead, with Hamas taking a number of Israelis captive.
Israeli media reported on Sunday that the security cabinet had officially declared the country at war over night. Prime Minister Benjamin Netanyahu had previously said on Saturday "we are at war," and vowed Israel would "take revenge for this black day."
Hezbollah, an Iran-backed organization that the U.S. also considers a terrorist group, on Sunday launched a barrage of mortar shells into Israel. The Israeli Defense Forces (IDF) then responded by shooting artillery into Lebanon. No casualties were reported on either side, according to Reuters.