The 48-year-old woman, who boarded an aircraft from Kuala Lumpur International Airport, was found carrying pandemic virus during a check at the Netaji Subhash Chandra Bose International Airport (Kolkata).
She was taken to the state government-owned Beliaghata ID hospital where she was now kept in an isolation ward for further testing, sources told UNI.
She was planning to visit Bodh Gaya in Bihar.
The matter was related to the British authorities in India.
The Kolkata airport authority began a random screening test for COVID19 in an effort to provide a safe environment for the passengers.
A city health bulletin on Sunday said altogether 9 fresh Covid-19 positive cases were detected in the last 24 hours.