NSW woman breaks leg jumping from blast

A woman has broken her leg after jumping through the window of her southern NSW house when a controlled explosion at a neighbouring munitions factory went off.

The factory, at Mulwala on the NSW-Victorian border, regularly tests products with controlled explosions, police say.

About noon on Monday a woman in a neighbouring property heard an explosion and "jumped out of the window of her house", a police spokesman told AAP.

Firefighters were called, but weren't required at the scene.

The woman was treated by Victorian paramedics before being taken to hospital.

Information is being sought from the Victorian ambulance service.