A person who residents say is a former tenant entered an Alameda apartment building Monday and intentionally sprayed bear repellent, leading to the evacuation of the building and surrounding vicinity, and injuring six, including an adult and child who were taken to the hospital.

We heard news on Monday afternoon about a hazmat incident in Alameda that sent an adult and a child to the hospital, and now we have more details about what occurred.

As KTVU reports, a person who's believed to be a former tenant entered a four-story apartment building on the 700 block of Santa Clara Avenue in Alameda Monday afternoon and intentionally sprayed an unknown substance.

The incident resulted in a four-hour shelter-in-place order while authorities determined the nature of the substance, and as KRON4 reports below, hazardous materials experts later confirmed it was bear spray.

Streets were closed between Webster and Page streets, and the building and nearby structures were evacuated, per NBC Bay Area. Per KTVU, an adult and child were taken to Highland Hospital in Oakland, and four others were treated at the scene for inhalation exposure.

Authorities have reportedly identified a person of interest in the bear-spray attack. A resident told KRON4 that a former tenant, who’s been known to trespass and create similar issues in the past, may be responsible for the incident, and there were reportedly posters in the lobby warning tenants about this person.

Image: The City of Alameda Fire Department

A refrigerant leak at a single unit in an apartment building near San Francisco’s Union Square prompted an emergency response from the San Francisco Fire Department on Sunday afternoon.

SFFD brought a hazmat team to the residence at 625 Bush St. around 4 p.m., the agency said on X, as KRON4 first reported. Three adults were treated for exposure to the leaked substance and have since been released from the care of SFFD medical teams.

The situation also caused disruptions in the busy area, leading to traffic delays along Bush Street between Powell and Stockton. SFFD urged the public to steer clear of the affected zone.

Authorities confirmed that the leak was an isolated incident and did not spread to neighboring units.

Refrigerant chemical leaks, usually from HVAC units or refrigerators, can be poisonous — they can cause headaches, coughing, respiratory trouble, dizziness, nausea, or even mild burns if skin gets direct contact. (The chemicals can also be flammable.)

Feature image via SFFD.

Twenty-six people were treated for nausea this morning at Recology's Pier 96 recycling center after being exposed to what officials initially thought might be a hazardous chemical spill. According to ABC 7, there is no larger threat to the public and the results of exposure are not life-threatening.

The first reports of a mass sickening came in around 8 a.m., and CBS 5 reports that a hazmat team was called in shortly thereafter. The plant in question sorts material from San Francisco's blue recycle bins, and a wide area around it was cordoned off as officials searched for the cause of the sickness and treated employees on site.

Two people required hospitalization.

Roughly an hour after the spill was first reported, officials with the SFFD determined that a chemical spill was not at fault. Rather, whatever caused the scare "was trash and standard material" — leading to the obvious question of what kind of recycling or trash is nauseating enough to make that many people ill.

Today's incident is not the first hazmat scare at Pier 96. In 2010 the West Coast Recycling center had to be evacuated after some sort of box on a conveyor belt broke open — sending white powder into the air and sickening employees. One individual was hospitalized in that case and 11 required treatment.

Related: Bottle Of Booze Deemed Suspicious, Briefly Closes Street Near AT&T Park

Someone at a China Basin loading dock took "if you see something, say something" to the next level this morning, when they called the San Francisco Police Department to report a "suspicious package" containing an "unknown liquid." The package? A bottle. The liquid? Booze.

At about 10 a.m. Tuesday, KCBS reports, police were called to 185 Berry Street, a building across the street from AT&T Park, after someone discovered the booze bottle and thought that its contents might be worrisome enough to "call for a hazardous materials team to come and investigate."

According to ABC7, the building, which they say was evacuated, "houses UCSF's imaging center at China Basin and the online storage site Dropbox."

Berry Street between 3rd and 4th Streets were closed to traffic while SFPD responded, but reopened at around 11:30 a.m. when "the suspicious package was deemed not hazardous," SFPD spokesperson Officer Gordon Shyy says, as "it was a bottle of alcohol."

According to SF Weekly, the bottle contained Scotch sent to a Dignity Health executive, but as the "package was wet and leaky," Dignity staffers decided the matter was suspicious enough to merit police intervention.

We mock, but it's probably better to be safe than sorry: after all, just a few hours from now, the area will be teeming with people, all headed to AT&T Park for playoff game 4 between the SF Giants and the Washington Nationals, which is scheduled to begin at 6:07 p.m.

Just in time for your evening commute, northbound South Van Ness Ave from Mission Street to Market Street has been close due to a hazmat situation. (Unconfirmed reports suggest a chemical leak.)

The nearby SFMTA building at Market and Van Ness has also been evacuated. People inside 1 S. Van Ness have complained about shortness of breath, according to KTVU.

No estimated time of the street re-opening.

We'll update as soon as we know more.

UPDATE 2:30: The crews, according to a nearby commenter, appear to have dispersed now. Not sure what the "mysterious white powder" was, but we'll update as soon as we know more.

2:10: Both St. Francis Memorial Hospital and the post office at 900 Hyde have now been shut down. The San Francisco post office was evacuated this morning at around 11:35 a.m. when employees found a "mysterious white powder on their clothing," prompting them to walk to the nearby hospital's emergency room.

KRON has more:

San Francisco Department of Public Health spokeswoman Eileen Shields said the five employees were evaluated at the hospital and released around 1 p.m. The hospital was not evacuated, hospital spokeswoman Dee Mostofi said. The Office of Emergency Services is asking the public to avoid the area around Pine and Larkin streets. The post office remained shut down as of 1:15 p.m.

12:48: We're getting word that the emergency room at St. Francis Memorial Hospital (1400 Pine) has shut down today due to a hazmat situation.

According to KRON 4, "Five people at the hospital...have similar symptoms caused by an unknown substance."

The San Francisco Department of Public Health is currently investigating the incident. Fire spokeswoman Mindy Talmadge tells BCN/SFAppeal that fire crews are “testing a substance on somebody's clothing” at the hospital.

We'll update as soon as we know more.

Three postal workers in San Jose fell ill after encountering a mysterious white powder at the downtown postoffice a little before opening time. "San Jose Fire Capt. Mary Gutierrez said a male and female employee of the Saint James Park Post Office said they weren't feeling well after one spotted a package of white powder about 8 a.m.," reports San Jose Mercury News. "A third person, a man, was also in the area at the time, and Gutierrez said he and the other two have already been decontaminated by a hazardous materials unit outside the 105 N. First Street post office."

CBS News goes on to say, "Four square blocks around the historic building at 105 North First Street were closed to traffic as hazmat crews tried to determine what had sickened the workers."

VTA light rail service has also been "interrupted on North First Street between St. James and St. John streets."

Check back with SFist for more updates.

Bay City News reports that an evacuation at Pier 96 in Bayview/Hunters Point happened a little after 6:30 a.m. this morning after "[a] box was going down a conveyor belt in the facility when it broke open and a white powder was released into the air."

More than a dozen people were treated for injuries, with one victim requiring additional treatment, "and was transported to a local hospital."

Folks from the U.S. Environmental Protection Agency, San Francisco Department of Public Health, and the city's fire and police departments are still trying to figure out what, exactly, was in the box.

The area was secured at 7:49 a.m.

Action News SF is reporting that "Montgomery [is] closed btwn Sacramento and California. Hazmat on scene."

The Hazmat truck, which you can see footage of here, and several emergency vehicles are at the Wells Fargo bldg at Montgomery and California.

A Hazmat team has closed San Jose Valley Medical Center's emergency room after an unknown chemical exposure. At least 37 employees, 47 patients were given Silkwood scrubdowns. The toxic mess, it seems, came from a nearby house. According to the Mercury News, "they don't know what kind of toxic substance was released around 8:05 a.m. inside a house on the 3000 block of Yucca Avenue. A barrage of hazardous materials crews are on scene trying to sort out the mess, police and fire dispatchers said." Also, the Merc is reporting that an 18-year-old man died this morning, possibly due to the spill. We'll update as soon as we know more.