The investigation into the Delhi blast has now revealed that the suspect vehicle was parked inside Al-Falah University on October 30. As the probe deepens, the NIA has tightened its crackdown on a growing terror network allegedly involving radicalised doctors. The investigation has expanded to six states - Jammu & Kashmir, Punjab, Uttar Pradesh, Haryana, Delhi, and J&K - with NIA teams carrying out continuous raids and questioning linked individuals.