Silchar, July 27 -- At least four people were killed and two injured on Sunday after an explosion at a metal processing unit in Assam's Cachar district spilled molten metal on workers, police said. According to police, the explosion occurred at around 11am at Kade Global Infrastructure LLP's metal processing unit at Pangram in the Udharbond constituency. The families of the victims and local residents demanded a thorough investigation into the incident, alleging that multiple explosions had occurred at the unit in the past.P11...