Four people were stabbed to death in the US state of Washington on Tuesday, with the suspect was shot dead by a police officer who responded to emergency calls.Pierce County Sheriff’s office said deputies had responded to reports about a man who was believed to be violating a “no-contact order” at a home near Tacoma in the western state.“While en route, multiple witnesses reported at 9:30 am that a male was stabbing people outside the home,” a statement posted on facebook said.“A solo deputy arrived, and shots were reported at 9:33am. There were four deceased individuals, including the 32-year-old male suspect.“A fifth victim was immediately transported (to the hospital) and later succumbed to their injuries.”