A UN human rights mission on the Gaza conflict is hearing from a range of experts on the social and the psychological effect of Israel’s 22-day war on Gaza.On the second of the two-day inquiry on Monday, a child psychologist told the panel that an estimated 20 per cent of children in Gaza suffer post-traumatic stress syndrome as a result of witnessing violence.

Dr Iyad Sarraj said: “The amount of killing and blood that they have seen or that their relatives have suffered from … is a huge amount, and this leads to negative psychological feelings, to radicalism and a cycle of violence.