The Green Line is stopping service on the B and C lines, starting at Park Street.
Mayor's office says city not responsible for network issues.
A total of 64 people were treated or evaluated at four hospitals, according to the Globe's Health & Science staff.
Governor Patrick speaking now.
Gov. Deval Patrick has started a press conference with Boston Police Commissioner Ed Davis.
BPD's Ed Davis: "At this point in time all of the victims have been removed from the scene."
All victims have been removed from the scene
BPD's Ed Davis: "We have determined that there has been a third incident," referring to the one at the JFK Library.
BPD Commissioner ed Davis: At 2:50 today, simultaneous explosions resulted in multiple casualties. We immediately activated a system of response developed by the city, state, and federal governments. There has been a 3rd incident that occurred at the JFK Library -- we are not certain that these events are related.
Two other explosive devices were found at the scene, according to Boston Police, and are being dismantled now.
If you know anything about this event, call: 1 800 494 TIPS
BPD's Ed Davis: Anyone with information on this incident should call 1-800-494-TIPS.