A man has died while operating machinery at a mine site in Western Australia's Goldfields.

The Department of Mines and Petroleum has confirmed the man was killed while working at the BrightStar Mine, south of Laverton, this morning.

Mines safety director Andrew Chaplyn said it is believed the man was fatally injured while operating machinery.

Police are at the scene.

A mine safety inspector is en route from Kalgoorlie to commence an investigation, and two further investigators will arrive at the mine tomorrow.

The mine is owned by Stone Resources, a small company with Chinese interests in ownership.

The company website says it has substantial tenement holdings in the Laverton region.

BrightStar is a large project with deposits running on a strike length of more than 110 kilometres.

The company said it had recently upgraded its plant equipment, including a cone crusher, ball mill, vibrating screens and wheel loader.

Four workers have died in accidents at WA mines in the past year.

Two people died at Fortescue Metals' Christmas Creek mine in the Pilbara, one at Newcrest Mining's Telfer gold mine in the state's north and one at Harlequin gold mine near Norseman in February.