The Israeli air force has carried out airstrikes on what it said were Hezbollah targets in southern Lebanon after rockets were fired over the border, a significant flare-up in tensions after a ceasefire brought uneasy calm to the region.

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.