by Max Brantley
Violent night in Boston with death of a police officer, death of a suspect and lockdown in neighborhood where another bombing suspect is being sought.
UPDATE: Getting wilder. This report says authorities believe the suspects are from the Russian region of Chechnya.
UPDATE II: The New York Times has a good roundup at 7:15 a.m. People in Boston are being urged to stay indoors while the hunt for the second suspect continues.