One man is dead and another has been seriously wounded in a double shooting in Sydney's south-west.

Paramedics found the two men in a garage at a home at Bardo Circuit in Revesby early this morning.

Both men had been shot several times, with one of them pronounced dead at the scene.

The other man was rushed to hospital with gunshot wounds to his leg and stomach.

He remains in a serious condition.

Police have not released the ages of the two men, and their relationship to each other is not known at this stage.

A crime scene has been established and detectives are interviewing neighbours.