Ambulances line up at the Rims in Ranchi on Friday JAMSHEDPUR/RANCHI: East Singhbhum and Ranchi, which have been worst hit by the second wave of the ongoing Covid-19 pandemic, has begun scouting for spaces to set up institutional quarantine centres for returning migrant workers. With lockdown in many states triggering a reverse migration of the workers, East Singhbhum deputy commissioner Suraj Kumar has directed the district officials to identify buildings which can be readied as quarantine centres. Nearly 6.2 lakh migrant workers returned to Jharkhand during the lockdown last year. The state government has recently made it mandatory for all returning migrant workers to undergo Covid-19 tests upon arrival and stay at quarantine centres for a week if they test negative in Rapid Antigent Test (RAT).