Chennai, Aug 21 (ANI): At least four workers were burnt alive in a major fire that broke out at a scrap plastic godown in Tamil Nadu’s Tiruvallur district in the wee hours of Thursday. Though fire fighters were able to rescue a few people including the watchman, the four victims, all workers, officials say were trapped in a small room in the middle of a near 100-foot-long yard. The cause of the fire is being investigated.