The Nagaland government prohibited entry of visitors to the state secretariat and other administrative buildings in wake of the coronavirus outbreak.
The state home department issued a notification barring the entry of the visitors to the state secretariat.
Official sources said other administrative buildings, including the police headquarters, started following the order on Friday.
The restrictions would continue till further orders.
The authorities have started screening all persons entering the state through trains at the Dimapur railway station.
Police personnel manning different check gates at the inter-state borders are also screening persons entering Nagaland by road.
The state government has also directed all deputy commissioners to temporarily suspend enrollment activities where biometric records are needed to be taken.
State health and family welfare department said there is no positive case of COVID-19 in Nagaland and no samples have been sent for testing till date.