An 18-year-old has been charged after Lafayette High School was placed under lockdown Friday.

Tri Tran of St. Joseph has been charged in Buchanan County with a misdemeanor for making terrorist threats.

Lafayette was placed under lockdown Friday after police began investigating threats of possible violence against the school.

“According to witness statements and police reports, the suspect Tri Trans sent several messages to students at Lafayette High School making them believe that he was in the school,” Det. Greg Ogdahl with the St. Joseph Police Department said in court documents. “He has made threats to other students in the past and was believed by school personnel and Law Enforcement that the suspect had access to guns by social media photos.”

School officials said everyone in the building was directed to shelter because of the threat of a weapon inside. The school was placed under lockdown for nearly two hours.

Tran was detained by police for questioning at another location.  He was charged Saturday in connection with the case.

Tran is being held on $10,000 bond.  An arraignment is set for Tuesday.