HYDERABAD: Police officials from Andhra Pradesh have helped put an exact number on the people who attended the 10-day Tablighi Jamaat meet in Delhi in mid-March. According to a detailed mobile tower analysis, as many as 13,702 people from across the country attended the event and all of them are now being seen as risk-prone.Authorities say that this gives a sense of the mammoth challenge that is facing them as they will now have to not only track down these individuals but also trace their contacts and keep them isolated for 14 days.Of the 13,702 people, as many as 7,930 have been identified as high risk in entire country followed by 5,772 as moderate risk. Uttar Pradesh , Tamil Nadu , Bihar, Jharkhand , Telangana and Andhra top the list of highest number of people who may spread the virus.AP police was alerted about the impending crisis when a brother-in-law of an elected representative in Guntur tested positive for Covid-19. They also identified another person from Chirala in Prakasam district who attended the Delhi meet. He also tested positive.Immediately, district collectors and superintendents of police were asked to collect information about who attended the program at Markaz Nizamuddin in Delhi. Sources in Intelligence Bureau said that along with central agencies, a digital data analysis of all persons who were likely to have been exposed to the virus in Delhi was done using mobile tower dump analysis."Deaths of some of the attendees in Telangana and Jammu Kashmir indicated that this was a pan-India phenomenon. Targeted testing of high risk people yielded a high number of virus positive test results. They were moved to quarantine and by counselling, their immediate family members and close contacts were also provided medical aid," said an IB official.The data pertaining to other states was transmitted through the central agencies."Apart from the state governments, all other stakeholders such as railways and airlines are also being alerted so that those who travelled along with the persons testing positive could be given medical assistance," a police officer said.