Defying government advisory on Covid-19, over 3,400 people had gathered at the Nizamuddin area for the Tablighi Jamaat event. The markaz (centre) in the south Delhi neighbourhood organised a Tabligh-e-Jamaat from March 1-15. On Sunday night, many residents of the centre started showing symptoms of Covid-19 and police and paramilitary officials locked down the area but authorities fear a possible spread of the virus. Meanwhile, the people participated in the event have been sent in quarantine. Follow the latest updates on Covid-19 here.