What is the story behind the viral photo of migrant worker crying on the phone?

A viral picture taken by PTI photographer Atul Yadav showed a migrant worker sitting on the roadside and crying on his phone. Identified as Bihar's Ram Pukar Pandit, his one-year-old son passed away and he was unable to see him. Ram Pukar used to work in Delhi and he tried to return home but was stopped at the UP Gate.