The massive manhunt for 19-year-old Dzhokar A. Tsarnaev, suspected with his older brother in the bombings Monday at the Boston marathon, has Boston and surrounding suburbs in a standstill after authorities warned residents to stay home.
Tsarnaev remains at large after a dramatic chase and shootout with police overnight. His brother, Tamerlan Tsarnaev, 26, was killed.
Residents in Boston, Watertown, Newton, Belmont, and Cambridge are being asked to stay indoors.
Massachusetts Bay Transportation Authority commuter services have been suspended, including buses and subways. Officials asked people at bus stops and subway stations on Friday morning to go home.
The Federal Aviation Administration closed airspace over a 7-mile area northwest of Boston. Amtrak suspended train service between Providence, R.I. and Boston indefinitely. Vehicle traffic in and out of Watertown was also suspended.
Taxi service in Boston has been suspended as well.
Harvard University and MIT closed this morning, as did other Boston-area colleges including Boston University, Boston College, Simmons College, the Berklee College of Music, University of Massachusetts Boston and Suffolk University.
The University of Massachusetts-Dartmouth, where Dzhokar Tsarnaev was a student, was evacuated.
The Boston area includes at least 85 colleges and universities that employ more than 70,000, according to a 2009 report from the Bureau of Labor Statistics. Employment in higher education and health services was 34 percent greater in Boston than the rest of the country, according to the report.