MBTA January 3, 2019 8:26 am Smoke on MBTA Red Line Tracks Causes Delays An investigation of smoke on the MBTA Red Line is causing a 10-minute delay for commuters. US & World Videos 3:05 100 protesters detained at Northeastern University 2:39 Community mourns police sergeant killed on duty 2:50 Community mourns Billerica police sergeant killed on duty 4:32 Anti-war protester at Northeastern speaks amid arrests: ‘We are peaceful students' 10:42 Multiple people arrested as police clear campus encampments