Updated

Three people were killed and two others injured Tuesday in attacks at a shopping mall and a home in Massachusetts, and the suspect was one of the dead, authorities said.

State police said a man stabbed two people at a home, then crashed a car through the front of a Macy's store at the Silver City Galleria and stabbed two other people at the mall. An off-duty law enforcement officer fatally shot the suspect. Witnesses described a chaotic and violent scene.

The stabbing victims were taken to area hospitals, where two later died from their injuries. It's unclear which victims died.

Authorities said the suspect also may have been involved in an earlier car crash on the street where the first two stabbings took place.

A motive for the attacks remains under investigation, but state police said they have found no evidence of a connection to terrorism.

There is no continuing threat to the public, authorities said.

Taunton is about 40 miles south of Boston.

Silver City Galleria is a regional mall offering 130 specialty stores, sit-down restaurants and a movie theater.