A major fire broke out at Sinhala Mines in Western Coalfields Ltd (WCL) here this morning and around 70 miners trapped inside were rescued by firefighters, a senior official said. "The fire broke out at the 14th level of the 5th rise in Sinhala coal mine this morning when the miners were on duty," Chief General Manager of WCL Chandrapur area, R K Mishra, said.