A total of 12 asymptomatic passengers who travelled in four flights of IndiGo have tested positive for COVID-19, the airline said on Thursday.

Three passengers who travelled on Delhi-Jammu flight on Tuesday, six passengers who were on Bengaluru-Coimbatore flight on Wednesday, two passengers who were on Delhi-Coimbatore flight on Wednesday and one passenger who was on Bengaluru-Madurai flight on Wednesday tested positive for the novel coronavirus, the airline said.