COVID-19 positive people in the country's largest public sector lender’s regional headquarters here has gone up to 27, official sources told PTI.Kamrup Metropolitan Deputy Commissioner Biswajit Pegu declared the complex as a "containment zone" and ordered it to be sealed with immediate effect "until further order" to prevent further spread of infection in the area."In view of the detection of more positive patients of COVID-19 in the SBI North East Head Office, which is located just opposite of the Assam Secretariat, the stringent step has been taken," the order said."Any unauthorised entry and exit into the notified containment zone is barred till the area is declared safe as per the guidelines.