Editor's note: this is a rapidly unfolding story. Details below are those reported by the Boston Globe and 7 News Live and may not be accurate.
According to 7 News Live, a sprawling incident unfolding near MIT's Cambridge campus and in the nearby town of Watertown actually appears to be the capture of the Boston Marathon bombing suspects.
Various news sources are reporting that the Marathon bombing suspects were engaged in armed combat by police forces late Thursday night and early Friday morning. One is reported to remain at large; the status of the captured suspect, who may have been stripped of clothing to ensure he was not carrying an improvised explosive device, is currently unknown. Some sources claim that suspect has died.
7 News Tweets:
The Boston Globe similarly confirms, possibly from a different source: