Hamas launched a surprise attack of Israel.
Reuters has a good article, which my broken app won’t let me link: (but it’s easy to Google)
JERUSALEM/GAZA, Oct 7 (Reuters) - Palestinian Islamist group Hamas launched the biggest attack on Israel in years on Saturday, killing more than 20 people and wounding hundreds in a surprise assault that combined gunmen crossing into Israel with a barrage of rockets fired from Gaza.
Israel said the Iran-backed group had declared war as its army confirmed fighting with militants in several Israeli towns and military bases near Gaza and Prime Minister Benjamin Netanyahu vowed to retaliate.
Israel says 22 Israelis have been killed and hundreds injured. Al Jazeera reports at least 4 Palestinians killed. Hamas claims to have taken several hostages alive into Gaza. People in and near Gaza are hiding as best they can on both sides.