israeli tanks are reported to be slowly advancing towards the centre of khan younis and there are reports of house to house fighting in the city. the head of the world health organization has said the war in gaza is having a catastrophic impact on health care there. tedros adhanom ghebreyesus warned health workers are having to work in unimaginable conditions in a desperate effort to help civilians. our correspondent yolande knell reports. an agonising goodbye. 14 people were killed in an israeli strike on a school who had been seeking safety in khan younis. theirfamilies school who had been seeking safety in khan younis. their families say. crushed by the rubble, this boy lost his mum, dad and an unborn robber. translation: his mum, dad and an unborn robber. translation: ~ ., ., , ., , ., , translation: what we want is to stop the bloodshed- translation: what we want is to stop the bloodshed. everyday translation: what we want is to stop the bloodshed. everyday we tran