 International pressure on Israel is increasing after dozens of people were killed in Israeli airstrikes further south on four schools. At least 29 Palestinians were killed and dozens more wounded on Tuesday in the Israeli airstrike on a camp for displaced people, which Gaza's Hamas-run health ministry says was next to the gate of a nearby school. Fergal Keane reports on the aftermath of this strike east of the city of Khan Yunus and a warning that some of the details may be distressing to you.