“The Israeli army severed northern Gaza from the rest of the besieged territory and pounded it with airstrikes Monday, preparing for expected ground battles with Hamas militants in Gaza’s largest city and an even bloodier phase of the month-old war. Already, the Palestinian death toll surpassed 10,000, the Health Ministry of the Hamas-run Gaza Strip said Monday. The ministry does not distinguish between fighters and civilians. About 1,400 people in Israel have died, mostly civilians killed in the Oct. 7 incursion by Hamas that started the war. The war has quickly become the deadliest Israeli-Palestinian violence since Israel’s establishment 75 years ago, with no end in sight as Israel vows to remove Hamas from power and crush its military capabilities. Casualties are likely to rise sharply as the war turns to close urban combat. Troops are expected to enter Gaza City soon, Israeli media reported, and Palestinian militants who have had years to prepare are likely to fight street by street, launching ambushes from a vast network of tunnels. “We’re closing in on them,” said Lt. Col. Richard Hecht, an Israeli military spokesperson. “We’ve completed our encirclement, separating Hamas strongholds in the north from the south.”