The civil aviation ministry on Friday asked airlines to modify their check-in systems for international passengers coming into India as part of the revised COVID-19 guidelines, which makes a negative COVID test report a must for travellers coming from China and five other countries from Sunday.

The ministry’s direction comes a day after the health ministry decided to make RT-PCR negative test reports compulsory for passengers coming on all international flights from six high-risk countries - China, Singapore, Hong Kong, the Republic of Korea, Thailand and Japan.