Four people have been killed in a stabbing attack in Washington state, with the suspect also found dead, authorities confirmed as investigators worked to establish a motive for the violence.

Emergency services were called to the scene following reports of multiple stabbings at a residential property.

Responding officers discovered four victims with fatal injuries.

The suspected attacker was later located and pronounced dead.

Officials have indicated that the suspect’s death is being treated as self-inflicted, though formal confirmation is pending the outcome of forensic examinations.

Law enforcement agencies secured the area and assured the public that there was no ongoing threat.

Identities of the victims are being withheld pending notification of next of kin.

Authorities have not yet disclosed details about the relationship, if any, between the suspect and those killed.

Investigators are conducting interviews with neighbours and potential witnesses while reviewing evidence collected at the scene.

Local officials described the incident as a deeply distressing event for the community and pledged full transparency as the inquiry progresses.

Support services have been made available to residents affected by the attack.

Police have urged anyone with relevant information to come forward as they continue to piece together the sequence of events leading up to the fatalities.

The incident adds to growing national concern over violent crime, though authorities cautioned against speculation until further details are confirmed.

Updates are expected as the investigation develops.