An 11-year-old boy was arrested after police said they found a “suspicious device” inside his home that had been brought on a Gray-New Gloucester school bus Thursday afternoon.

The Cumberland County Sheriff’s Office responded to the sixth-grader’s home after the bus driver pulled over in New Gloucester and evacuated about 15 middle and high school students from School Administrative District 15.

Investigators determined that the device was not explosive, authorities said on Friday, but did not answer questions about what the device was. The student, who was not named, was released to his parents’ custody.

Superintendent Craig King said the school district is doing its own investigation and could pursue suspension or expulsion if appropriate. The district has about a dozen policies that deal with threats to the school, he said.

“We have a student who has made a really unfortunate decision that disrupted the entire school and community,” he said. “It created a lot of fear and anxiety for people.”

The sheriff’s office announced Friday that the student was charged with terrorizing, but Cumberland County District Attorney Jackie Sartoris said her office has not yet decided if it will file charges against the boy.

“This case will be referred to my office for review and possible charges, but it has not been received and no one has been charged at this time,” Sartoris said in a statement. “There are absolutely no criminal charges currently pending against this middle schooler. I would hate for this family to go into the weekend believing that to be the case.”

To be guilty of terrorizing under Maine law, a person must communicate a threat of “violence dangerous to human life.” And the threat must be serious enough that either the potential victim or a third-party who hears the threat could have a “reasonable fear that the crime will be committed” – a Class D crime – or that “a building, place of assembly or facility of public transport” are evacuated – a Class C crime.

In February, state lawmakers were scrambling to fix Maine’s law after a U.S. Supreme Court decision made it difficult for prosecutors to support a terrorizing charge. In March, they succeeded, and the governor signed off on the emergency updates, which took effect immediately.

Ricker Road and Bald Hill Road were temporarily shut down as multiple law enforcement agencies responded to Bus 13 on Thursday. The road was reopened when they learned there was no longer a potential threat, the sheriff’s office said in a statement Thursday.

King, the superintendent, told the Press Herald on Thursday afternoon that the incident also delayed dismissal for some elementary school students. Some school officials responded to the scene as well, he said.

“I think people did a really good job at sorting out the situation in the moment,” he said.

On Friday, guidance counselors and teachers checked in with each student who was on the bus, King said. Counselors also were available for students and school staff spent time talking to parents about what happened, he said.

Staff Writer Gillian Graham contributed to this report.