--Twenty-four hours after a Herald cover story about BPD undercover agents who are aiming to reduce groping of women on public transportation, the tabloid reports that they've already busted one alleged criminal. The incident was on the green line and involved a 20-year-old BU student victim. [Boston Herald]

--Four bombs made of household products were used to explode mailboxes in Lexington. Police there say they've received confessions from three teenagers, who could face felony charges. [WHDH-TV]

--A swastika and "a racist message" were found in a hallway of a Northeastern University freshman dorm. Authorities there may have a suspect, someone they say is outside of the student body. [Boston Globe]

--A witness who was scheduled to appear before a trial at Dorchester District Court allegedly had a gun pulled on him from a passing car and was warned not to speak out in court. [Boston Globe]

All charges alleged until proven under law.