Lebanon's Hezbollah movement fired heavy rocket barrages at Israel on Sunday, and the Israeli military said houses had been destroyed or set alight near Tel Aviv, after a powerful Israeli airstrike killed at least 29 people in Beirut the day before.

The U.N. Security Council unanimously adopted Resolution 1701 in August 2006 as part of a cease-fire that ended Israel’s last war with Lebanon. The resolution sought to create a buffer zone in southern Lebanon to prevent fighting between Israel and Hezbollah, but has failed to keep the peace.

Now, the latest conflict between Israel and Hezbollah, a U.S.-designated terrorist group, is dragging Beirut back into a cycle of violence, just as it was beginning to stabilize after years of chaos.Israel says its airstrikes are targeting Hezbollah’s infrastructure,