Teenager in custody after five people are found dead in a shooting at a home in Washington state, police say

A 15-year-old was arrested Monday after five people were found dead in a home in Fall City, Washington, in an incident “committed with a firearm,” law enforcement officials said.

Two adults and three of their children were found dead after deputies responded to 911 calls Monday morning about a “disturbance involving gunfire,” according to the King County Sheriff’s Office.

The victims were Mark and Sarah Humiston and their three children, and the suspect is their 15-year-old son. CNN affiliate KING reported.

Mark was an electrical engineer and Sarah was a registered nurse, KING5 reported. The children killed were “young teenagers,” Mike Mellis, a deputy and spokesman for the sheriff’s office, said at a news conference on Monday.

Another child – a girl – was injured and taken to Harborview Medical Center in Seattle. Her condition was “satisfactory” on Tuesday, a hospital spokesperson told CNN.

“It appears this is a family incident. A domestic violence incident clearly involves not only a young man who is now in serious trouble, but also firearms. Young men and firearms,” Mellis told reporters on Monday.

According to the United States, there have been at least 427 mass shootings in the United States this year Gun violence archivewhich, like CNN, defines a mass shooting as a shooting in which four or more people are injured or killed, not including the shooter. It is gun violence main cause of death among minors in the U.S., according to the U.S. Centers for Disease Control and Prevention. According to the archive, more than 1,100 children and teenagers were killed in mass shootings this year alone.

The deaths in Washington state occurred “with firearms” and “there was no significant confrontation” with the suspect when he was arrested, Mellis said.

The suspect waived his attendance at his first hearing in juvenile court on Tuesday, according to his public attorneys.

Prosecutors have not yet formally charged him because the case has not yet been referred to them by police, said Casey McNerthney, a spokesman for the King County Prosecuting Attorney’s Office.

In a statement, the teen’s attorneys, Amy Parker and Molly Campera, described their client as a “15-year-old boy who enjoys mountain biking and fishing and has no criminal history.”

“Once again, the law says that our client is presumed innocent of these charges, and we are grateful for a judicial process that requires proof and evidence before a verdict is reached,” the attorneys said.

A neighbor said she was “in total shock” after hearing about the deaths.

“I keep breaking down in tears,” the neighbor, Lynne Trowern, told KING5. “That’s why I have to go to my daughter’s house, because I can’t be here alone. I just see the children’s faces.”