New Delhi Mar 30 PTI Four men who were trapped inside a sewer in northwest Delhis Sanjay Gandhi Transport Nagar area have died and their bodies were pulled out early Wednesday morning following an overnight rescue operation officials saidOf the four three men were private contractual employees who were working on MTNL lines at the time of the incident on Tuesday afternoon police said The fourth is a rickshaw puller who had tried to save the three workers but also got trapped in the sewerThe rescue operation started after the Samaypur Badli police station got information about the incident around 630 pm on TuesdayApart from the police fire department officials and a team of the National Disaster Response Force were also part of the rescue effortAccording to the fire department the operation ended around 4 am on Wednesday with the four bodies pulled up from the sewer Police said post mortem will be conducted at Babu Jagjivan Ram Memorial HospitalThe deceased workers have been identified as Bacchu Singh Pintu and Suraj Kumar Sahni The rickshaw puller Satish 40 was a resident of Sardar Colony in Rohini Sector-16Officials said The rickshaw puller who tied to save the workers was a hero But he also got trapped inside the sewer There is an iron net beneath the MTNL lines inside the sewer It was suspected that the four got stuck there they addedToxic gas inside the sewer made the rescue operation difficult even with protective gears Earth-moving machines were used to widen the mouth of the sewer police saidSatish the rickshaw puller is survived by his wife Neha 35 and three daughters -- Tisha 14 Kritika 8 and Arbi 3 PTI NIT NB NSD