A 28-year-old suspect stabbed four individuals and assaulted three others at various locations in Taunton, Mass., on May 10, before he was shot and killed by an off-duty deputy sheriff. At least two victims have died. (Reuters)

Four people were stabbed and three more assaulted Tuesday in separate but related attacks at a shopping mall and a home in Massachusetts, and two of the victims have died. The others were taken to local hospitals. The suspect, who has been identified as 28-year-old Arthur Darosa, was shot and killed by an off-duty law enforcement officer.

The stabbings occurred in Taunton, Mass., a city about 40 miles south of Boston. Two people were stabbed at a home, and two others in a Bertucci’s Italian Restaurant at the Silver City Galleria Mall, Bristol County District Attorney Thomas Quinn said in a press conference Tuesday evening.

The names of the victims have not been released — nor has the name of the off-duty police officer, though NECN reported he is an officer with the Plymouth County Sheriff’s Office.

Though Darosa was allegedly responsible for both sets of stabbings, they took place at different locations.

At around 7 p.m., he crashed his car on Myricks Street, then he allegedly began running around the neighborhood and trying to break in various houses. Eventually, he managed to break into the home at 270 Myricks Street in Taunton, where he stabbed an 80-year-old woman and her daughter with a kitchen knife.

Doug Kinsman, a neighbor of these victims, said the scene was “chaos.”

“He was definitely not in the right state of mind,” Kinsman told WCVB.

The mother and daughter were taken to Morton Hospital, where the mother, reportedly named Patricia Slayvin, died.

Darosa then allegedly stole a black car, which he crashed into an entrance of Macy’s at the Silver City Galleria mall in Taunton. After exiting the car, he allegedly assaulted three customers in the department store, before entering Bertucci’s restaurant in the mall. There, he armed himself with a knife and stabbed two more people, according to Quinn.

“People were throwing chairs at him and stuff,” a witness named Rosa Bostick told WCVB. “I went into the beauty salon and I told them ‘There’s a killer, there’s a killer’ and we all went to the back room.”

Emily Higgings, another witness, added, “I saw him just start stabbing people. He just went off. He was mad about something. We don’t know what. We just ran and ducked for our own safety.”

One of the victims from Bertucci’s, an unidentified 56-year-old man, has died. A witness told WBZ the other victim was pregnant.

Witness at Silver City Mall in #Taunton tells me: "I heard shots and saw cops loading ar-15s and i ran for my life." pic.twitter.com/h6wPnXHiaz — David Wade (@davidwade) May 10, 2016

After he allegedly had stabbed two diners at Bertucci’s, an off-duty deputy sheriff shot DaRosa once. The suspect was taken to Charlton Hospital and pronounced dead, NECN reported.

“It appears that but for the actions of the deputy sheriff, there may very well have been other victims,” Quinn said in a press release. “I want to extend my heartfelt prayers and sympathies to the victims of this horrific violence.”

As of now, no motive has been released. WBZ’s Liam Martin reported that DaRosa’s family says he was in the hospital Monday for suicidal thoughts and released shortly before his violence spree.

The DA’s Office said an investigation is underway, and no more details can be released at this time. Massachusetts State Police have confirmed there was only one suspect.

This is a developing story and has been updated. First published: 8:24 p.m.