Bengal secretariat Nabanna will be closed for sanitisation on Monday as at least seven people who visited the 15-storey building in the past one week tested positive for Covid-19.

“Of the seven patients, six were drivers of senior government officials and another was a police officer. A disinfection drive would be carried out at the building on Sunday and Monday,” said a senior official.

Since a number of drivers tested positive, the government has conducted Covid-19 confirmation test on all drivers as a precautionary measure.

“Test results of most of the drivers have come and almost all have tested negative. But as a precautionary measure, the entire building would be sanitised,” said a source.