The Indian state of Maharashtra has announced a mandatory seven-day institutional quarantine for all passengers flying in from "countries at-risk".
They will also be required to take three RT-PCR tests - on the second, fourth and seventh days after arrival.
The decision, which will come into effect immediately, was made late Tuesday after six international passengers from "countries at-risk" tested positive for COVID-19.
According to the state's health authority, all six passengers were "either asymptomatic or mildly symptomatic", with their samples sent for genome sequencing.
Meanwhile, all domestic travellers flying into Maharashtra will have to present a negative RT-PCR test report with 48-hour validity.
The list of "at-risk" countries includes European countries, the UK, South Africa, Brazil, Botswana, China, Mauritius, New Zealand, Zimbabwe, Singapore, Hong Kong and Israel.

US Supreme Court strikes down Trump's global tariffs
Police search royal mansion as investigation into king's brother goes on
7 bodies found after Chinese tour bus plunges into frozen lake in Russia's Siberia
ASOS co-founder Quentin Griffiths dies in Thailand after balcony fall
Former Philippines president Duterte will not attend ICC pre-trial hearings