UPDATE: A jar with chemicals has been removed from Sir Charles Gairdner Hospital after a scare on Friday.

According to a Department of Fire and Emergency Services spokesperson, the jar was found at the Nedlands site around 2pm.

As a precaution, police and firefighters were called out to the scene.

It remains unclear what the substance was inside the jar.

The jar was taken from the scene by the WA Police bomb squad just before 7pm, with tests to be conducted.

It’s the second time in less than three months parts of SCGH have been evacuated due to a chemical find.

In May, multiple outbuildings were shut down when unstable chemicals were found in a hospital storeroom.

On that occasion, the WA bomb squad moved in to secure the site.