Body of missing swimmer found in NSW river

A woman's body, believed to that of 38-year-old Corrina Lee Dever, has been found in the Hunter River in NSW.

Ms Dever was last seen in the river at Muswellbrook on Monday.

Police say she was swimming with a 51-year-old man who left for a moment and returned to discover she was nowhere to be seen.

Police divers found the body, which is yet to be identified, on Tuesday near where Ms Dever was last seen.