A woman has been killed by police and three officers have suffered knife wounds in a morning domestic dispute in Massachusetts.

Authorities say police went to a home in Somerville at about 6:30 a.m. Friday after a man called to say his girlfriend had lunged at him with a knife and tried to set a fire.

When officers arrived, the woman went after them with a knife. Officers opened fire, killing the woman.

Three officers were taken to a hospital but officials say their injuries are not life threatening.