Around 100 miners today ransacked the office of Eastern Coalfield Limited's general manager after chunks of coal fell on two colleagues and grievously injured them. Bhagaban Chowdhury, 49, and Madhu Bauri, 47, were cutting coal at the north Searsole colliery in Ranigunj, 230km from Calcutta, when the incident occurred around 8am. They were rushed to the ECL hospital in Asansol.