GRAND CHUTE, Wis. (AP) — Police have arrested a high school junior in the killing of two people at a home in eastern Wisconsin.

Police officers found the victims at the house in Grand Chute during a welfare check Sunday. The 17-year-old boy was arrested at the home.

The teen is in the Outagamie County Jail on suspicion of first-degree intentional homicide.

Authorities haven’t released the victims’ names, but police said in a news release that the teen knew them. No information has been released about how they died.

Grand Chute police say the killings were “an isolated incident, with no danger to the public.”

Neenah Joint School District said in a statement today the student also planned to cause harm at the high school. The district and police have released no details of the alleged plan.