Cabinet secretary Rajiv Gauba has asked states to urgently strengthen the surveillance of international travellers who entered the country before the lockdown as there appeared to be a "gap" between the actual monitoring for Covid-19 and the total arrivals.

from Times of India https://timesofindia.indiatimes.com/india/covid-19-cabinet-secretary-says-gap-in-actual-monitoring-asks-states-to-strengthen-surveillance-urgently/articleshow/74848436.cms