Israel launched hundreds of airstrikes in southern and eastern Lebanon on Monday, killing 492 people, including 35 children and 58 women, as the Israeli military called on residents to immediately evacuate places where it claimed the Hezbollah militant group stores weapons. Thousands of people fled southern Lebanon, jamming the main highway to Beirut in the biggest exodus since the 2006 Israel-Hezbollah war. More than 1,645 people were wounded in the strikes, the Health Ministry said, a staggering one-day toll for the country.

The Israeli military said it hit more than 800 targets Monday linked to Hezbollah weapons sites. It said it was expanding the operation to include areas of the Bekaa Valley, along Lebanon’s eastern border. Residents of different villages in southern Lebanon posted photos on social media that they said showed their towns that were being struck.

The wave of airstrikes came after a day after Hezbollah fired over 100 rockets into northern Israel, with some landing near the city of Haifa. Hezbollah’s rockets were in response to an Israeli airstrike on a Beirut suburb on Friday that killed a top Hezbollah military commander and more than a dozen members, along with civilians including women and children. Last week, thousands of communications devices , used mainly by Hezbollah members, exploded in different parts of Lebanon, killing 39 people and wounding nearly 3,000.

Lebanon blamed the attacks on Israel, but Israel did not confirm or deny its responsibi.