The head of powerful Lebanese armed group Hezbollah said on Monday that residents of northern Israel would not be able to return home for the start of the next school year if their government pressed on with its offensive in the Gaza Strip. Hezbollah has been exchanging fire with the Israeli military across Lebanon's southern border in parallel with the Gaza war. The armed group has said it is launching rockets at Israel both to support its ally, Palestinian armed group Hamas, and to deter Israel from launching an attack on Lebanon.