Israeli troops opened fire on a group of vehicles in Gaza including ambulances due to a "perceived threat following a previous encounter in the area", a preliminary IDF inquiry has said. Fifteen emergency workers were killed in the incident near the southern city of Rafah on 23 March. Sky News' Mark Austin questions Israeli government spokesperson David Mencer on the investigation into why aid workers were killed. Read more: https://news.sky.com/story/atrocious-killing-of-15-aid-workers-by-