An Israeli airstrike in southern Lebanon killed five people Sunday, including three children from the same family along with their father. Lebanon’s Prime Minister Nawaf Salam decried the attack as a “massacre.” Lebanese officials said four of the victims, including the children, were U.S. citizens, but the U.S. State Department has disputed the claim. The Israeli military acknowledged carrying out the attack, saying the target of the strike was a member of Hezbollah.