The manhunt for Boston marathon bombing suspect Dzhokhar A. Tsarnaev is underway in and around Watertown, Mass. Many residents, including Tagg Romney, son of former Massachusetts Gov. Mitt Romney, are being told not to leave their homes.

According to AP,

Authorities urged residents in Watertown, Newton, Arlington, Waltham, Belmont, Cambridge and the Allston-Brighton neighborhoods of Boston to stay indoors. At least a quarter of a million people live in those suburbs. All mass transit was shut down, and businesses were asked not to open Friday. People waiting at bus and subway stops were told to go home.

Update:

All Boston residents are reportedly being asked to remain indoors at this time.

All Boston Public School activities have been suspended.