India's government on Thursday announced a one-day curfew for the 1.3-billion populations and banned international flights to test the country's ability to fight the coronavirus pandemic. Prime Minister Narendra Modi called on Indians in a nationwide address to observe a "Janata (civil) curfew" on Sunday from 7:00am to 9:00pm as he warned that the deadly virus could spread further.

"No-one should leave their homes; roam around the streets or in their neighbourhoods... This self-imposed curfew attempt will be a strong symbol to show self-restraint in the interest of the country," he said.

The one-day effort will help "prepare us for future challenges," he added.

The government says there have been 173 infections and four deaths but the public is increasingly anxious and there has been a rush on food stores and essential supplies. Modi warned the public not to be complacent, pointing out that there had been an "explosion" in the number of cases worldwide. "We are a developing country and we cannot say that it won't impact India," he said.

Most people, except those in essential services, will have to stay home for several weeks, he added, without giving a timeframe.