Students have been evacuated and police are in attendance at a Perth high school.
Parents have been warned to stay away from Ashdale Secondary College in Darch following an unknown threat.
News.com reports officers rushed to the school just after 9am, and students were soon evacuated to a primary school across the road while officers investigated.
WA Police told news.com.au nothing was found at the school and it will be reopened shortly.
More to come: