Law officers have arrested a teenager in connection with the deaths of five people found fatally shot inside a home southeast of Seattle.

Mark and Sarah Humiston were identified as two of the the victims who died, according to an employer and multiple news outlets. Three of their children were killed in the attack. The suspect and the victims, including an 11-year-old who was injured in the shooting, are related, officials have said.

More than 24 hours after five people were found shot dead in a Washington state home, including three school-age children, the public awaits more details from authorities about what occurred – and why.