Amid a surge in cases of Omicron variant in the country, the Ministry of Civil Aviation on Tuesday issued new guidelines for international travellers from 'at-risk' countries arriving at six major airports to mandatorily prebook an RT-PCR test starting December 20.

As per the notification issued by the ministry, all international travellers arriving at airports in Delhi, Mumbai, Kolkata, Chennai, Bengaluru, and Hyderabad will have to compulsorily prebook an on-arrival RT-PCR test.