Libyan ISIS chiefs living in fear of ‘mystery sniper’ after three of the terror group’s top men are assassinated by long-range marksman

Libyan ISIS chiefs living in fear of ‘mystery sniper’ after three of the terror group’s top men are assassinated by long-range marksman  The leaders are said to have been picked off one-by-one over the course of 10 days in Sirte, the Libyan coastal city where Muammar Gaddaffi was born, which the militants took control of last year.