Colombo: At least 21 Indian nationals were detained by Sri Lankan authorities for illegally operating a computer-operated business in the country, in violation of the relaxed tourist visa norms, according to officials on Wednesday. The Indian men are in the age group of 24 to 25, and were detained by the Department of Immigration and Emigration on Tuesday.Colombo: At least 21 Indian nationals were detained by Sri Lankan authorities for illegally operating a computer-operated business in the country, in violation of the relaxed tourist visa norms, according to officials on Wednesday. The Indian men are in the age group of 24 to 25, and were detained by the Department of Immigration and Emigration on Tuesday.