A 43-year old builder was allegedly shot dead at his friend house in west Delhi's Bengali Colony, police said on Thursday. Police said the deceased, Manmohan was on Wednesday night at around 11.30 p.m found shot dead at Sujeet Ghosh's residence. "The Police was informed by one Vikas Chandra, 68, who stays in the same building. Chandra heard noise of Manmohan, he went to check but in the meantime Sujeet closed his door. Sensing trouble Chandra immediately called police," Deputy Commissioner of Police Shibesh Singh said. "We have booked Sujeet, his wife, Shashi and two sons, Abhijeet Ghosh and Abhishek Ghosh and a probe is on to ascertain their roles in the crime.