When a motorist spotted a tabby cat wandering the streets with a jam jar stuck on its head he stopped to help the poor puss. However, closer inspection revealed a scene that could have come straight from a Tom and Jerry cartoon. The jar was stuck fast around the tabby's neck - and just millimetres from the her hungry jaws was a cowering field-mouse. Unable to free the cat - and fearing the mouse would be gulped down - the driver scooped up the animal, named Mindy, and took her to a nearby police station. After the receptionist failed to free Mindy, three burly police officers were called in to help. However, no amount of pulling and twisting could shift the jar - so Mindy took matters into her own paws. She casually trotted over to a wall and with a swing of her head smashed the jar against it. Before she had a chance to pounce on her prey once again, the mouse fled. A spokesman for Cambridgeshire Police said: "Mindy was taken to Thorpe Wood Police Station after being found walking on the A47 in Peterborough with a jar on her head. "At the bottom of the jar was a tiny fieldmouse. "A number of burly police officers tried to prise it off the cat's head, with the mouse sitting there looking at them. "It was like a scene from Tom and Jerry. No one had seen anything like it. "We were worried the cat was going to suffocate or that she would be badly cut if we broke the glass. "RSPCA officers were called but before they arrived Mindy just smashed the jar against the wall. "We took her to see vet who discovered she was microchipped and she was later reunited with her owner, who lives in Peterborough about two miles from where she was found. "As for the mouse, as far as we know it's still running around the police station."