In a series of tweets, Delhi airport said operations for international arrivals are running smoothly after the implementation of the new guidelines laid down by the Union health ministry. "Total 1,013 passengers from 4 'at risk' flights, successfully completed arrival formalities due to availability of Rapid PCR Test along with RT-PCR test. "792 passengers decided to take Rapid PCR Test, and 221 passengers opted for RT-PCR Test," it said. Three flights were from London, and one was from Amsterdam, according to an airport official.