The Gaza militant attacks that have left at least 200 people dead and hundreds injured are unprecedented, Israel’s Prime Minister Benjamin Netanyahu said late Saturday.”What happened today has never been seen in Israel. We will take mighty vengeance for this black day,” Netanyahu said in a televised speech from Israel’s Government Press Office, which was carried by Reuters.”Israel will reach every place Hamas is hiding,” Netanyahu said, referring to the militant group behind the attacks. “I tell Gaza’s people to leave those places now.”He also referred to the Israeli soldiers and civilians taken hostage by Hamas fighters.