Israel increased airstrikes on the Gaza Strip and sealed it off from food, fuel and other supplies Monday in retaliation for a bloody incursion by Hamas militants, as the war's death toll rose to nearly 1,600 on both sides. Hamas also escalated the conflict, pledging to kill captured Israelis if attacks targeted civilians without warnings. In the war's third day, Israel was still finding bodies from Hamas' stunning weekend attack into southern Israeli towns. Rescue workers found 100 bodies in the tiny farming community of Be'eri — around 10% of its population — after a long hostage standoff with gunmen. In Gaza, tens of thousands fled their homes as relentless airstrikes leveled buildings. MORE: https://www.cbs8.com/article/news/nation-world/israel-hamas-conflict/israel-hamas-conflict-gaza-strip/507-1b9351ac-5ad0-42d0-bdee-adf1b811a4bb