Winnipeg police and the city are investigating after a woman discovered a spy camera hidden in the changing room of a public pool.

A swimming instructor at Seven Oaks Pool was filmed with a hidden camera in the employee change room. She found the pen-style camera in the washroom and on its hard drive was a video of her naked.

"We actually met with the victim this afternoon," said Const. Jason Micalyshen of the Winnipeg Police Service. "We've taken a formal report, and we're going to move forward with the investigation taking this matter very seriously."

The city released a statement that said it takes the incident very seriously, and its staff are working with the police.