Police allege the 27-year-old used a phone to record in a restricted staff bathroom at Austin Hospital in Heidelberg on July 3.

The device is believed to have been in place “for some time” before staff reported it, police said.

A search warrant was executed at an address in Heidelberg West today.

The man was arrested and is now being interviewed.

No charges have been laid.

A spokesperson for Austin Health said it was taking the matter “extremely seriously”.

“We take the safety and wellbeing of our staff extremely seriously and recently made a formal report to Victoria Police,” the spokesperson said.

“As this matter is now with the police, we are not able to share more information about the nature of the report.”