Israeli strikes on Lebanon killed at least 31 people on Monday, authorities said, following rocket fire from Hezbollah after the killing of Iran's Supreme Leader Ali Khamenei.
Israel's military vowed to intensify its attacks on Lebanon and make Hezbollah pay a "heavy price" after strikes on Beirut's southern suburbs and south Lebanon, where Hezbollah holds sway.
US and Israeli strikes on Iran, which began two days ago, have now killed 555 people, including over 160 when a school was hit on Saturday.
Around 35 people have been killed in Iran's southern Fars province, local media reported Monday.
"Thirty-five people have been killed in Fars province in American and Zionist attacks," Tasnim news agency reported quoting Ebrahim Bayani, head of the province's state-run martyrs foundation.
"Given the continuation of the enemy air strikes this morning, this number may rise," he added.