At least 31 people were killed during Israeli bombardment of the Gaza Strip on Sunday, Palestinian medics said, with nearly half of the deaths in northern areas where the army has waged a month-long campaign it says aims to prevent Hamas regrouping.Palestinians said the new aerial and ground offensives and forced evacuations were "ethnic cleansing" aimed at emptying two northern Gaza towns and a camp of their population in order to create buffer zones. Israel denies this, saying it is fighting Hamas militants who launch attacks from there.For the latest updates on the Israel-Palestine conflict, visit our dedicated page.Medics said at least 13 Palestinians were killed in separate attacks on houses in Beit Lahiya town and Jabalia, the largest of the enclave’s eight historic refugee camps and the focus of the army’s new offensive.The rest were killed in separate Israeli airstrikes in Gaza City and in southern areas, including one in Khan Younis, which health officials said had killed