Iran fired a lot of missiles at Israel, causing explosions across the country.
Israel's military was able to stop many of the missiles, but some did hit targets in the center and south.
Israel warned Iran that there would be serious consequences for the attack, and some people in Tel Aviv were hurt by shrapnel.
Iran claims the attack was revenge for the deaths of leaders from Hezbollah and Hamas, and they threatened more attacks if Israel retaliates.
