Explosions, airstrikes, and gunfire rattled northern Gaza on Saturday, the third day of an Israeli military operation that has uprooted tens of thousands of Palestinians and compounded what the UN called “unbearable” living conditions in the territory. An AFP correspondent reported explosions from the Shejaiya area near Gaza City, and a resident saying bodies were seen on the streets. The armed wings of both Hamas and Palestinian Islamic Jihad said they were engaged in ongoing fighting with Israeli forces there. Israel’s military, meanwhile, said its operations were continuing in Shejaiya wher…