A strike on the Jabalia refugee camp killed at least 47 people Tuesday -- including a Hamas commander involved in the October 7 attacks, according to Israel. "This is just the latest atrocity to befall the people of Gaza where the fighting has entered an even more terrifying phase, with increasingly dreadful humanitarian consequences," Martin Griffiths, the UN humanitarian chief, said in a statement. He said "the world seems unable, or unwilling, to act," adding "this cannot go on. We need a step change."