An Israeli strike on a house in the Jabalia refugee camp sheltering displaced Palestinians has killed at least 32 people, including 13 children, as rights groups warn of an "extremely grave situation” in northern Gaza amid weeks of ongoing military siege. According to a witness, the house was full of women and children who had been displaced from different parts of northern Gaza and had ended up in this particular building. In a separate attack in Gaza City, an Israeli air strike on a house in the Sabra neighbourhood killed Wael al-Khour, an official at the Welfare Ministry, and seven other members of his family, including his wife and children, medics and relatives said. The Ministry of Health in Gaza said more than 50 people were killed in total and 164 injured in three attacks across Gaza on Sunday. page 5