Lehigh Career and Technical Institute was placed on lockdown Friday after a threat was made against the school.

According to A message posted on the school’s website. Students were detained in high schools and ordered not to attend morning classes. Later Friday morning, school officials updated the message that the school was closing for the day “out of an abundance of caution.”

State police spokesman Nathan Branosky confirmed the threat, but did not provide specifics. He said a school resource officer and the state police’s Troop M criminal investigation unit in Bethlehem are continuing to investigate. A spokesperson for the school could not be reached for comment.

Located in North Whitehall Township, LCTI provides career and technical programs to approximately 2,700 high school students from nine Lehigh County public school districts.