An ATM deployer in Oregon discovered recently that a mouse was responsible for some of the losses it had experienced at its machine.

According to press reports, an employee at the Gem Stop Chevron in La Grande was surprised to find a mouse inside the ATM, happily nesting on a bed of shredded $20 bills.

The ATM continued to function despite the mouse, employees said. The mouse had chewed up two bills and damaged another 14 to make his nest, but the deployer reinserted all the money that wasn’t extensively damaged.

The deployer released the mouse and employees could not answer questions about how the mouse got inside the machine.