"All (his) primary contacts have been traced and are asymptomatic. Home quarantine has been advised and being followed-up," it said.
According to sources, the patient is from Mumbai.
He travelled from Greece to Mumbai on March 6, and came by flight to
"He was hospitalised the same day. One brother of his is staying with him in Bengaluru..parents and wife are in Mumbai," sources said.
The man used an autorickshaw to commute in Bengaluru.
Information has been collected about the driver and three members of his family and all precautionary measures have been taken.
The department also said all primary contacts of previously reported four people who tested positive for the virus are under surveillance and no symptomatic cases have been reported.