A woman in the US has been shot in the leg by her own puppy, NBC reports.

Brent Parks and his wife Tina were in the car with their 7-month-old yellow labrador Molly when the incident happened.

Molly got spooked by a passing train and jumped from the backseat onto the front console where a loaded .22 calibre handgun was resting.

The gun then went off and shot Tina in her left thigh above the knee.

She was rushed to hospital and underwent surgery. She’s expected to make a full recovery.