Screen grab  from a user generated content video uploaded on social networks on January 5th, 2016 said to show a petroleum storage tank burning at Al-Sidra oil terminal, near Ras Lanuf in the so-called “oil crescent” along Libya’s northern coast. Photograph: AFP Photo/Getty Images

Three days of Islamic State (Isis) attacks on Libya’s biggest oil terminals have started fires that have spread to five massive oil storage tanks, a g(...)