The East Coast Railway (ECoR) has deployed drones to keep a vigil and ensure the security of its assets, infrastructure and vital installations during the nationwide lockdown which is in force to contain the spread of COVID-19. During the lockdown, assets like coaches and PRS counters are out of sight as they are not in use. This is in addition to assets on use yards, signalling infrastructure, stations, relay rooms, goods sheds and wagon stock, a senior railway official said.