NEW DELHI: India is likely to blacklist about 300 foreigners who came from 16 countries, including Malaysia and Thailand, on tourist visas but attended an Islamic congregation at Nizamuddin here that has become a key source for the spread of coronavirus in the country, officials said on Tuesday.These foreigners were among around 8,000 people who attended the Tabligh-e-Jamaat at Nizamuddin Markaz facility in March, many of whom have shown symptoms of COVID-19, a Union Home Ministry officlal said.About 30 of those who attended the Nizamuddin event in mid-March tested positive and at least three have succumbed to the infection in last few days."Those who came on tourist visa but attended the Nizamuddin event stands being in our blacklist as they have violated the visa conditions. Tourist visa holders can't attend religious function," a Union Home ministry official said.If a foreigner is put in the Home ministry's blacklist, he or she can't travel to India in future.A total of 281 foreigners were found by the police at the Nizamuddin campus in the last two days.They include 19 people from Nepal, 20Â people from Malaysia, one from Afghanistan, 33 from Myanmar, one from Algeria, one fromÂ Djibouti, 28 fromÂ Kyrgystan, 72 from Indonesia,Â 7 fromÂ Thailand, 34 fromÂ Sri Lanka, 19 fromÂ Bangladesh, three fromÂ England, one fromÂ Singapore, four fromÂ Fiji, one from France and one from Kuwait.Most of these foreigners came on a tourist visa, an official said.