File Photo - St. Patrick High School (Acadia Broadcasting File Photo)

Students are set to return to class at St. Pat’s in Thunder Bay after a tense day at the high school.

Classes were cancelled on Tuesday after a threat was made against the school.

The Thunder Bay Catholic District School Board gave the all-clear later in the day after officials combed through the building and did not find anything.

The school board also announced regular classes would be held on Wednesday.

It’s not known what type of threat was made or how it was discovered.

Anyone with information is asked to contact city police or Crime Stoppers.