Israeli Prime Minister Benjamin Netanyahu said on Tuesday he has ordered the army to immediately carry out “powerful strikes” in Gaza, a new test for the tenuous US-brokered ceasefire. The order from Netanyahu follows heightened tensions, as Israel reported Hamas firing on its forces in southern Gaza and after Hamas returned a set of remains that Israel said belonged to a hostage recovered earlier in the war. Netanyahu called the return a “clear violation” of the ceasefire agreement, which...