The victims – identified as Kanta Prasad (37), Jaggi (30) and Shyam Singh (40) – were engaged in contract work by Indraprastha Gas Limited. A fourth worker Nitin Singh (32), who used to live with the victims in the same tent, managed to escape the inferno while the other three could not come out of the tent on fire. An initial probe indicated that the fire was sparked by a lamp used to light the tent and as the fire spread a gas cylinder also burst. The victims were living in temporary accommodation under a tent near a DDA plot on Manglam Road near the Rotary Club office. A case of causing death by negligence was registered by police in East Delhi’s Anand Vihar area. The fire was brought under control by 2.50 a.m., a fire official said. A police source said Shyam and Kanta’s father Rampal was questioned as to how one person managed to escaped the fire while three others were charred to death.