A man in his 20s has been airlifted to hospital after a serious accident on a rural property south of Ballina this afternoon.

NSW Ambulance said the incident happened on River Drive at Keith Hall, with emergency crews getting the call just after 2.30pm.

Paramedics were told the man had fallen from an undisclosed piece of equipment and suffered head injuries.

The Westpac Rescue Helicopter was called to land nearby and the patient was transported to the Gold Coast University Hospital.

At this stage, his condition is unknown.

More to come.