Police are investigating after a pig’s head was found in a Muslim prayer room at the University of Western Australia.

PhD student Majdi Fal was preparing for his regular prayers at the university’s mosque when he came across the gruesome find inside a toilet room.

Mr Fal said he initially thought the head belonged to a human and believed it was a racially motivated incident.

“It was frightening and it was shocking to find a huge head inside the toilet,” Mr Fal told 9NEWS.

“Obviously the people behind it, the perpetrators, had a message behind it.”

The bathroom house a traditional Turkish toilet. (Majdi Fal/Facebook)

Mr Fal said made the discovery yesterday. (Majdi Fal/Facebook)

Mr Fal said the bathroom housed “a traditional Turkish toilet used mostly by Muslims for the ablution before performing their prayers”.

He posted images of the head to his Facebook account yesterday and urged fellow students to report any suspicious activity.

The University of Western Australia has expressed its disappointment at the incident in a statement.

“The University is very saddened by this deplorable act,” the statement read.

“It is concerning that people using the UWA Muslim prayer room have been targeted in this way.

“UWA strives to support a culturally inclusive and tolerant campus community and the University will offer help and support to our Muslim students at this time.”

West Australian police are investigating.