Israel continues to hammer northern Gaza despite U.S. hopes that the killing of Hamas leader Yahya Sinwar could be a turning point in the year-old conflict.

Israel's military spokesman says "anyone who will be near the sites used to finance Hezbollah's terrorist activity is required to stay away from them immediately", promising strikes in Beirut and elsewhere in Lebanon.

Palestinian officials say hundreds of people have been killed in Israel's two-week operation in northern Gaza, and that the health sector is close to collapse.