Four migrants ​working as fruit pickers in slave-like conditions in southern Italy have been burned to death in a grisly murder case that is prompting fresh national soul-searching over labour exploitation. The migrants were found on Monday in ​a burned-out ‌van parked in a petrol station in Amendolara, in the southern region ⁠of Calabria. Surveillance cameras showed two people setting the car alight before running away. FRANCE 24's Seema Gupta reports from Rome.