Trinity High canceled school Thursday after reports of a "suspicious person" in the area, though police said no specific threat was made against the school.

The school was locked down at about 7:40 a.m. and students were gathered into the cafeteria while police searched the building, Robert Mullen, president of the school said at a press conference after the incident. The lockdown was lifted at around 9 a.m. after nothing suspicious was found in the building.

A juvenile rider on a nearby TARC bus called Trinity to report a suspicious person traveling near the school, according to St. Matthews Police Chief Barry Wilkerson. School officials called 911 and St. Matthews Police Department and Louisville Metro Police Department responded to the scene.

The individual who reported the person to police said the person was wearing a full mask and what appeared to be "full body armor beneath a coat," Wilkerson said.

"We found nothing suspicious here, and we’ve received no other phone calls throughout the community," Wilkerson said. "So that leads us to believe it was an individual who maybe just had on a mask and was going to work or going somewhere else that really wasn’t a threat to anyone."

Less than 100 students were at Trinity at the time of the lockdown, according to Mullen. Students in attendance were there only to take final exams and were set to leave school early following their tests. Finals weren't scheduled to begin until 9 a.m.

"There’s no difficulty in delaying exams," Mullen said. "I think we reacted like any other school in this community would. When the police notify you that they want to check things out, you do that."

Related:When will Trinity make up exams canceled by Thursday's lockdown?

Jefferson County Public Schools spokeswoman Renee Murphy said Waggener High School and St. Matthews Elementary School also increased their security levels due to reports of a suspicious person in the area of Trinity. Those two schools were still in session after raising their security level to stage 4, police said.

TARC has a policy of not allowing individuals to board or ride the bus while wearing a mask, said TARC communications manager Jeremy Priddy.

He said it’s “unlikely” that a person got off a TARC bus wearing a mask but said TARC is looking into it. He said no TARC driver has contacted TARC about an incident like this.

Priddy referred other questions to St. Matthews police but said that all TARC buses do come equipped with video and audio recording.

Trinity previously canceled school on Nov. 29 after St. Matthews police said a threat against the school was made following football coach and famous alumnus Jeff Brohm's decision to remain at Purdue instead of returning to take the open position at Louisville. A man was arrested in connection in that case and has pleaded not guilty to charges of second-degree terroristic threatening. He maintains he was merely making an obvious joke on Twitter.

This story may be updated.

Read this:Is a felony charge going too far for man accused of Trinity threats?