Prime Minister Benjamin Netanyahu ordered Israel's military to "forcefully react" after fighting resumed soon after a 72-hour cease-fire between Israel and Hamas expired Friday morning. Israel said at least 18 rockets had been fired from Gaza and Israel Defense Forces spokesman Lt. Col. Peter Lerner confirmed that "terror sites" were being targeted. Prior to fighting, Israel said it was willing to extend the cease-fire. But a senior Hamas official told The Associated Press it was rejecting the proposal after learning that Israel refused the group's demands to reopen Gaza's borders.