BEIRUT, Lebanon (AP) — Israel launched airstrikes on several locations in Lebanon on Saturday in retaliation for a rocket attack, killing six people in the heaviest exchange of fire since its ceasefire with the militant group Hezbollah began nearly four months ago.

Israeli artillery and airstrikes hit south Lebanon on Saturday after Israel said it had intercepted rockets fired from across the border, killing at least eight people and endangering a shaky truce that ended a year-long war between Israel and Lebanese armed group Hezbollah.