Francis Pelosi, 56, of Boston, was arrested around 7 p.m. yesterday after he locked himself in an emergency-department men's room at Massachusetts General Hospital, the Suffolk County District Attorney's office reports.

While arguing with hospital staff and police trying to get him out, Pelosi allegedly threatened to kill the Chelsea police chief, the DA's office says, adding a former Chelsea chief now works in security for the hospital.

Boston's largest, most award-winningest newspaper has a handy tip for Beacon Hill parents on Halloween: "Wash any loose rat droppings from your kid's candy before ingesting."

Also alerts us that lots of college students live on Mission Hill and that drug users have been known to frequent Central Square.

Channel 25 rips the covers off this scandal. Or something.

Boston Police report a psychiatric patient was fatally shot by an off-duty security guard after he attacked a doctor with a knife this afternoon in a Mass. General building on Staniford Street.

Police say the security guard, who does not work for Mass. General, shot Jay Carciero, 37, of Reading, "multiple times" after he had stabbed the doctor repeatedly. Both victims were taken to the nearby emergency room; he was pronounced dead, the doctor, identified by the Herald as Astrid Desrosiers, is in stable condition.

Channel 5 posts photos from the attack scene at 50 Staniford St., where Mass. General leases office space.

Police Commissioner Ed Davis talks about the violence.

This is the second knife attack in a Boston hospital in two days. On Sunday, somebody was stabbed in the neck in the Boston Medical Center emergency room. And it's the second attack of any kind at MGH - on Thursday, a man allegedly tried to rape a woman in a hospital restroom.

David Flavell, charged with attacking and attempting to rape a woman in a Mass. General restroom on Thursday was ordered sent to a secure unit at Bridgewater State Hospital for observation for 20 days to determine whether he's competent for trial, the Suffolk County District Attorney's office reports. He's next scheduled to appear in Boston Municipal Court on Nov. 16 for a status hearing.

Boston Police report David Flavell, 40, was arrested after allegedly attacking a woman in a hospital restroom. According to police:

Preliminary investigation, at this time, indicates that the victim was assaulted by the suspect but that no sexual assault occurred.

Flavell is scheduled for arraignment today in Boston Municipal Court on charges of assault with intent to rape and assault and battery by means of a dangerous weapon.

Flavell was convicted in 1998 of assault with intent to rape and in 2001 on two counts of open and gross lewdness and lascivious behavior, according to his record at the state Sexual Offender Registry, which lists him as a "a high risk to reoffend." In 2008, he was arrested on charges of assaulting a woman in a restroom at a Braintree bookstore. The Herald lists more charges against him.

His last listed address was 444 Harrison Ave. - the Pine Street Inn.

No, don't fret, Angelo Scaccia of Hyde Park isn't one of them. Josh Dawson reports Rose Staram, a Dorchester Democrat, started a fundraising committee this year for a possible run against Liz Malia of JP, while Marty Walz of the Back Bay, has opposition in Republican Brad Marston, who already has 1600+ followers on Twitter.

Location

Boston Police tweet the bomb squad is at Suffolk University's 8 Ashburton Pl. building.

Karen Sutton explains how a be-robed Governor of the Commonwealth came by to help her son clean up at the State House yesterday.

Earlier:
Sometimes the third graders are a bit more combative.

State Police are at the Longfellow Bridge right now, checking out a "suspicious package," Boston Police tweet. Presumably, it is not made of Lite Brites.