Boston Marathon Bombing Manhunt: Boston T, Amtrak, Greyhound, Peter Pan, Other Transit Options Shut Down Friday Morning

In the wake of the discovery of the suspects wanted in the Boston marathon bombing, Officials have shuttered numerous vital transportation links to the Boston area. One of the first major transportation modes to shut down in the area was rail transit. Amtrak has ceased "Downeaster" service, which runs from Maine's midcoast region to downtown Boston has been all but shut down. More notably, arguably Amtrak's most important run, the Northeast Regional, connecting the entire Bos-Wash region has seen its service curtailed significantly.

Inbound travelers to Boston from New York and Philadelphia will need to disembark in Rhode Island: the farthest north station option for them is Providence. The Northeast Regional connects to Washington, D.C, where service is available toward Rocky Mount or Raleigh, N.C. as well as Chicago and Miami. Many commuters rely on the line every day, and its abridgement will likely cause delays. Greyhound and Peter Pan bus lines have frozen their schedules in Boston. MegaBus, which operates low-cost intercity bus service, has also ceased their operations near the Charles River.

The Massachusetts Bay Transportation Authority, which operates "The T", Boston's subway, as well as city bus service is mostly shut down. The only line in service is the Silver Line, which connects to Logan International Airport. Flights from Logan to all points are departing as planned, and air travel is the only major transit mode mostly unaffected by the dragnet over Boston. Flyers should check with their particular airline to see if their flight has been altered.

Major roadways are open, but the police advise against travel in the area. Interstate 95 and the Mass Pike are open, but affected areas in Watertown and Cambridge are completely cordoned off by police. Residents are being asked to stay inside and numerous schools and colleges have cancelled classes.

CBS's Scott Pelley reported that "an active manhunt for a terrorist on the loose" is ongoing for suspect Dzhokhar Tsarnaev, originally from Chechnya.