This is everything we know so far.
Where did the crash occur?
The crash took place at a shopping centre on Derby Street in Hingham, a coastal town southeast of Boston, Massachusetts.
When did it happen?
Plymouth County District Attorney Tim Cruz said during a press conference on Monday that several 911 calls came in from the Derby Street shops at around 10.45am.
“A dark-colored SUV ... went through at a rate of speed undetermined, through a … glass window and struck multiple people,” Mr Cruz told reporters.
What was the emergency response?
Following the crash, several people were laying on the ground just outside the store as they were being taken care of by first responders.
Police called for a tow truck to remove the vehicle which was lodged in the back wall of the shop, trapping people inside. Several ambulances from departments some distance away from Hingham were brought to the scene, as well as a medical helicopter.
A bus from the MBTA was also put into use as triage.
As of 11.49am, the South Shore Hospital wasn’t taking on any further patients, police radio communications revealed, The Patriot Ledger reported.
What were the injuries?
The victims were taken to hospitals by ambulances after a Black SUV crashed into the store, Mr Cruz said during the press conference on Monday.
“Fourteen of the victims were taken to South Shore Hospital and Weymouth and two victims [were] taken to Boston area hospitals,” Mr Cruz said.
Those numbers later grew, with South Shore Health saying during a subsequent press briefing that they were treating 17 people from the crash for everything from head trauma to limb damage, WCVB reported.
The chief of trauma at South Shore Health, Dr Christopher Burns, told the press that “we have multiple patients with life-threatening injuries”.
“We have patients in the operating room and people we anticipate going into the operating room,” he added.
Two other victims were taken to Boston for treatment, officials said.
Hingham Fire Chief Steve Murphy said that several people were pinned against the door at the back of the shop.
Has the driver been identified?
Mr Cruz said the driver was a man that was in the presence of police officers after the crash. He added that he was unable to say at this time if prosecutorial action will be taken, but that there is an “active criminal investigation going on”.
“Regarding the operator of the motor vehicle, we’re looking into that,” Mr Cruz said. “Regarding the status of the motor vehicle, we’re looking into that. Obviously, we’re going to get the information we can and go forward.”
One person at the scene told a local TV station that the driver appeared to be bloody but alive when he was removed from the SUV by emergency workers.
The Patriot Ledger identified the car as a Toyota 4Runner.
How has Apple responded?
The page for the Derby Street location on Apple’s site states: “We’re sorry for the inconvenience while this store is closed. Until we can reopen again, please consider using our online services.”
Mr Cruz said employees were “visibly shaken and they’re assembling nearby”.
“This investigation is active and ongoing. We are very limited as to what we can say at this point,” he added.
How much property damage was done?
The glass wall of the store had a large hole in it, footage from the scene shows.
Chief Murphy said that the structural integrity of the building was being evaluated but that were no concerns at the time of the press briefing on Monday afternoon.
What have witnesses said?
“It sounded like an explosion,” one witness said, according to WCVB. “It was so loud.”
“You’d have to really be picking up speed to end up in the storage area at the back side of the Apple store,” Frank O’Brien, who was shopping in the area at the time of the incident, told WCVB.
Lynne Goyuk told Boston 25 News that “it sounded like a bomb went off. We saw several people who should have sought medical attention, but they wouldn’t go over because they knew other people were critical”.
“I just heard like glass shatter, and everyone ran to the window because they thought it was a smash and grab, and there was just a gaping hole in the middle of the Apple Store,” Emily McKenna told the local station. “I didn’t see the car drive by but someone said it was going pretty fast, so maybe he just lost control.”
“My wife is at Derby Street in Hingham, a black 4Runner drove full speed into the Apple store,” one man posted on Twitter shortly after the crash. “She said there are a lot of injuries − my wife used a spare jacket as a tourniquet.”