Edmonton police said an investigation was underway stemming from an online threat that was allegedly made against a school administrator at a south side high school Wednesday.

Police said Harry Ainlay High School was placed under lock down Wednesday morning after 11 a.m., as a precaution – it’s alleged a threat was made online against one administrative staff member at the school.

EPS said the lock down was lifted after a suspect was arrested.

Anyone with information about the incident, or the individuals responsible, is asked to call the Edmonton Police Service non-emergency line at 780-423-4567 or #377 on a mobile phone. Anonymous tips can be submitted to Crime Stoppers by calling 1-800-222-TIPS (8477).