The subject that caused a precautionary lockdown at Belfield Public School, Thursday, is now believed to be in the Williston area.

The school was on lockdown for the majority of the day, per request from the Belfield Police Department, as it searched for an adult male subject, Juan Bustamante. Law enforcement believed he may have been in the Belfield area.

The Belfield Police Department said in a media statement: "This decision was made based on the fact that we were unable to locate the subject, he was a wanted aggravated felon and was known to law enforcement to have violent tendencies."

Bustamante was part of an investigation into a vehicle crash on Highway 85, north of Belfield, Wednesday. Through cooperation with other agencies, the Billings County Sheriff's Office determined that Bustamante was the driver of one of the vehicles involved in the crash.

He has black hair, two neck tattoos, 6'0" tall and 180 pounds who was last observed wearing a red sweatshirt.

The Belfield Police Department said in a media statement: "We ask you to be aware of your surroundings because he is not in custody. If you see anything out of the ordinary, please contact the Belfield Police Department."

All evening activities at the school were cancelled, Thursday. The school will reopen Friday.

Superintendent Daren Kurle thanked staff, students, parents and law enforcement for the smooth handling of the situation.