UPDATE: Students at Twin Lakes Secondary School in Orillia have been evacuated but the school remains in lockdown due to a reported threat.
The Simcoe County District School Board reports that staff and students are safe.
Students have been moved to nearby Harriett Todd elementary school.
Police are not saying what the nature of the call is, except to say it was a threat made to the school
The lockdown has been in effect since just after 9 am.
Several OPP tactical officers and K9 Unit are on site.
Harriet Todd ES remains in a hold & secure.
A hold & secure means activities continue inside the building, but exterior doors are locked & no one is allowed to enter or exit.
More details as they become available.
(Photo via Ian MacLennan)