The ceasefire agreement between Israel and Hezbollah in Lebanon appears to be holding, raising hopes of a lasting respite after a 13-month border conflict that spiraled into an all-out war in September.

BEIRUT — Israel on Thursday carried out its first airstrike on Lebanon since a truce with Hezbollah announced this week, saying it targeted the militant group’s activity at a rocket storage facility in southern Lebanon that breached the ceasefire.

Israel said on Thursday that its ceasefire with Hezbollah was breached hours after Lebanese security sources said Israeli tanks attacked six areas of southern Lebanon, calling into question a truce reached after more than a year of fighting.