Israeli tanks went deeper into Gaza’s Jabalia in northern Gaza on Tuesday, ordering residents to leave as it pummeled the historic Palestinian refugee camp from above. Palestinian medics said casualties had been reported in Jabalia but that they were unable to reach areas under fire. Israeli forces have placed Jabalia under siege over the last several days, while ramping up attacks on the north of the enclave at unprecedented levels. A former spokesperson for the UN agency for Palestinian refugees, Chris Gunness, condemned Israel’s “slaughter” in Gaza. “In the last year, we have seen Gaza tran…