Aizawl District Superintendent C Laldina told PTI that overnight mobile and foot patrolling is on and uniformed and plainclothes officials would be deployed even in the remotest areas of the city.
This was being done due to recent explosions in the city, Laldina said.
Security would also be tightened in and around the vital installations, he said adding elaborate security arrangements were made to ensure that no insurgent groups from across the borders could disrupt peace and public tranquility in the state.