PLYMOUTH — A Plymouth High School student has allegedly confessed to making a bomb threat last week.

PHS principal James Condon said Tuesday morning that authorities met with the minor, detailed the evidence they had and the student confessed.

Condon would not say whether the student has been expelled, but said school authorities are working with the Plymouth Police Department "to ensure that due process is followed."

The threat, which was written on the stall of a bathroom at the high school, indicated a bomb would be detonated at the school Friday. School officials, along with police, searched the building, made Friday an optional attendance day and continued classes.

Nothing suspicious was found during the searches and no bomb was detonated.

Condon said numerous students, parents, staff and teachers assisted police in determining the identify of the student who allegedly made the threat.