Officials from Iran and Hezbollah helped plan the attack, people familiar with the operation said, but the U.S. and its allies have not found evidence directly linking Tehran.
Israel accused Hamas, a Palestinian militia, of firing rockets into Israel from Lebanon, underscoring its deepening ties with Hezbollah, the dominant Lebanese militia.
Tensions along the border between the two countries have escalated to the highest level in years. On Friday, a shooting attack in the occupied West Bank killed two Israelis.