New Delhi, Sept. 8 -- Delhi Police on Monday arrested the owner of a five-storey building that housed Delhi University students and crumpled a day earlier, as the toll in the tragedy climbed to seven and questions swirled about the negligence of the municipal authorities and state government. Hariram Bansal, a 81-year-old former airforce sergeant, was arrested from Rajasthan's Bhiwadi. His wife Urmila Gupta, 75, and son Mahesh Gupta, 52, were also arrested. Bansal and his wife were sent to 14-day judicial custody. His son, whom police said administered the building, was sent to two-day police custody. The order was passed by Judicial Magistrate First Class Bhavya Kharail after all three were produced at her residence. The government suspended five Municipal Corporation of Delhi (MCD) officials as the Delhi High Court ordered a high-level inquiry into the incident, the second such building collapse in the Capital in less than four months. Rescuers worked through the night to pull people buried under mounds of rubble and chunks of concrete as plumes of smoke blanketed the neighbourhood where cramped buildings flouting multiple guidelines house tens of thousands of students from DU, where official accommodation is dwarfed by the annual pupil intake. The rescue operation concluded around 5.10pm on Monday and teams were withdrawn from the site, the Delhi Fire Service. "My son had big dreams and I was working hard to make them come true.Everyone is telling us how bad the condition of the PG was. I wish my son had told me before. I would have never let him stay there," said Dewas resident Bhupendra Jaj, whose son Arpit Jahaj was a 18-year-old student at ARSD college. Driven by greed, building owner Hariram Bansal and his brother constructed four illegal floors in a nearly 50-year-old structure despite knowing that the building's foundation could give way under the additional load, the police FIR said. The tragedy occurred around 1.30pm on Sunday when renovations were underway on the ground floor of the paying-guest accommodation, known as Hostel Daze. At the time, around were inside the building in a neighbourhood packed with matchbox buildings and cubbyholes offering little ventilation, dilapidated furniture, damp walls and blocked exit routes. Seven people were pulled out dead from under the rubble. Five of them were students - Abhishek Kumar, 20, Yuvraj Soni, 20, Pawan Kumar, 17, Arpit Jahaj, 18, and Akshat Singh Yadav, 18. The two others were Surinder Singh, 75, and Pawan Lal Kori, 30; both worked as labourers. Those injured were Asgar Ali, 30, Neeraj Bawan, 19, Aditya Kumar, 19, Nitish Chib, 19 and Mohammad Ayan, 18, are students. "[The building's] owners are Hari Bansal and his brother, who for the greed of rent had constructed four floors and some new construction was also going on due to which a lot of pressure was on the building's strength and due to that building's load bearing strength had crossed and today it collapsed," the FIR said. The building - opposite Sri Venkateswara College on the west of Benito Juarez Marg - was one of dozens of PG accommodations in the congested resettlement colony teeming with restaurants, cafes, roadside eateries, stationery shops and grocery stores. The building had about 15 rooms, with two to three students in each. Rooms were let on a twin- and triple-sharing basis at about Rs.12,000 to Rs.15,000 a bed per month. Police said the building was owned by Bansal, a resident of Gurugram, and registered an FIR under sections 105, 290, and 125 of the Bharatiya Nyaya Sanhita (BNS) at the South Campus police station....