All those who attended the religious gathering in Delhi - hosted by Tablighi Jamaat -- or were in the vicinity, are being traced through cellphone data, sources in the Delhi Police told NDTV. The Crime Branch has been investigating the case as it was identified as a hotspot for the spread of the highly contagious coronavirus. More than 1000 people - around a third of the coronavirus cases in the country - have been found to be linked to the gathering, which was attended by a large number of foreign nationals.