New Delhi [India], October 21 (ANI): Delhi Police has taken all the CCTV DVRs of the nearby and front market in its possession in connection with the CRPF school blast investigation, sources. In the CCTV footage, a suspect can be seen at the spot wearing a white T-shirt. The activity was seen at the blast spot the night before the blast, sources said. According to Delhi Police sources, the explosive was planted by wrapping it in a polythene bag and planting it in a half to one-foot-deep pit. After planting, the pit was covered with garbage. An explosion occurred outside CRPF School in Prashant…