At least 50 people in Tamil Nadu have tested positive for coronavirus after returning from a large religious gathering at Delhi's Nizamuddin that has emerged as a virus hotspot with links to seven COVID-19 deaths. Amid a nationwide manhunt for the participants, Delhi Chief Minister Arvind Kejriwal said 441 more in the capital have shown symptoms of the virus and that there could be a spike when more were tested. In the middle of a national lockdown, close to 2,000 people had been staying at "Markaz Nizamuddin", the Delhi headquarters of the Tablighi Jamaat group, for weeks. Over 1,100 are now quarantined in different parts of the city and lanes near the religious centre have been taped off by officials in hazmat suits. A police case has been filed against the mosque administration. The home ministry has instructed states to track down Tablighi members who travelled to various parts of the country after the two-day gathering on March 8-10.