Three people were killed and two others injured 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 Taunton 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.
A motive for the attacks remains under investigation, but state police said they have found no evidence of a connection to terrorism.Authorities said the suspect also may have been involved in an earlier car crash on the street where the first two stabbings took place.
"There is no continuing threat to the public," said Dave Procopio, a state police spokesman.
Justin Pizarro, 19, told the Boston Globe that he was working at a store in the mall at the time of the stabbings. He told the newspaper that a security guard told him to close the gate of his store.
Pizarro said he was "shaken up," but that "the security guards handled it pretty well."
Taunton is about 65km south of Boston.
Silver City Galleria is a regional mall offering 130 specialty stores, sit-down restaurants and a movie theatre.