Visibility was extremely low from 6am onwards at the airport in Dabolim, around 30km from the state capital, the Airports Authority of India said.
Airport authorities said two international flights were diverted to other cities. One of them - a chartered aircraft from Russia - was diverted to Bengaluru, while the other flight - from Manchester, UK - was asked to land at the Mumbai airport.
Flights began landing from 8.30am onwards when the visibility improved, they added.
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