BEIRUT — Palestinians in northern Gaza described heavy Israeli bombardment Saturday in the hours after airstrikes killed at least 22 people, as Israel continued to tell people there and in southern Lebanon to get out of the way of its offensives against the Hamas and Hezbollah militant groups.

Israel’s military said it was “operating with great force” against Hamas and allied groups and issued new evacuation orders, as it also continued its campaign in Lebanon.

On Friday, Israeli strikes hit four houses in Jabalia, killing around 20 people and wounding dozens, medics said. The Israeli military has sent troops into the nearby towns of Beit Hanoun and Beit Lahiya as well as Jabalia and ordered residents to evacuate their homes and head to safe areas south of the enclave.