Illinois police have made an arrest after a man allegedly shot and killed his wife and 16-year-old sister-in-law in, all while two children hid in another room, as reported by ABC 7.

Crystal Lake police announced that Ryan Yarber, 31, was charged with four counts of first-degree murder in the shooting deaths of Allania Yarber, 31, and her sister Anniyah Reynolds, 16, according to Chicago Tribune.

Responding officers are said to have found Allania and Reynolds’ bodies inside the home. The pair were pronounced dead at the scene, authorities have noted.

An 11-year-old, who was in the home with the couple’s 9-year-old son, told reporters that his friend locked the bedroom door when the family started arguing.

“Their mom and dad got into a fight,” 11-year-old Juan Viveros commented. “They just started screaming at each other and saying bad words to each other. And then, soon we heard a scream downstairs. And then we heard bangs, loud bangs.”

“I felt bad for him because he just lost two family members.”

Speaking with CBS Chicago, Viveros said he hid under the bed upon hearing gunshots. The 11-year-old also said that Ryan had gone outside and called police. A 19-year-old neighbor recalled hearing screaming before officers arrived, investigators have noted.

Officers shielded the young boys with blankets while escorting them out the home so they wouldn’t see the gruesome scene, police say.

Neighbors told the Daily Herald that the family moved from Oregon last October. The single-story home supposedly housed eight people: the couple, twin sisters, two brothers, a friend, and a grandmother. Neighbors also told the paper that one of the twins, the friend, and the grandmother were on a trip in Virginia at the time of the shooting.

Police recovered a semiautomatic handgun at the scene. They also called the shooting isolated and said there was no threat to public safety, according to WMAQ.

Ryan Yarber is scheduled to appear in court on Saturday.

[Featured Image: McHenry County Sheriff’s Office]