Both of them have been admitted to Beliaghata Infectious Diseases Hospital.
One of them was detected with the disease on Tuesday while the other tested positive on Wednesday.
The Union Minister of Health and Family Welfare Harsh Vardhan on Thursday said that the three cases are being monitored closely and asked people not to panic. The minister also said that the contact history of all three has been traced.
The minister added that screening is being conducted at 12 major and 65 minor ports. He allayed fears saying that 402 people who were quarantined along the Indo-Tibet border have tested negative and their conditions are stable.
He said that the three persons from Kerala who were earlier diagnosed are now stable. These three cases were the first reported cases in India.