Gurugram, Feb. 24 -- The death toll in the Faridabad fire rose to six after two more victims succumbed to burn injuries during treatment in Delhi, police said on Monday. Officials said that Ranbir, 44, one of the two injured firefighters, died at AIIMS Trauma Centre at 9 pm on Sunday. Within hours of Kumar's death, Brij Pal, 21, also succumbed to his injuries at Safdarjung hospital. Yashpal Yadav, public relations officer of Faridabad police, said that at least two people are still critical. He added that they have not been able to make any development in the case as people have either died or are still undergoing treatment. "Forensic experts have collected samples of lubricants and chemicals from the spot and are awaiting the report," he said....