October 14, 2015 9:25 pm Gas Main Explosion Prompts Evacuations in Medfield, Mass. Houses have been evacuated Wednesday after a gas main explosion in Medfield, Massachusetts. US & World Videos 2:58 Karen Read trial: Defense accuses prosecution witness of perjury 2:24 Gov. Maura Healey reacts to Steward bankruptcy filing 9:57 Week 2 of the Karen Read trial resumes Monday 2:33 Karen Read trial resumes Monday 2:07 Steward Health Care files for bankruptcy