Two men have died in a tandem skydiving incident near Picton, about 90 kilometres south-west of Sydney.

Police and New South Wales Ambulance were called to the front of a property on Wilton Road in Wilton about 2pm on Saturday, after a local resident raised the alarm.

Police said the two men — an instructor believed to be in his 60s and another man in his 20s — were found dead at the scene.

It is understood they were completing a tandem jump, supervised by Sydney Skydivers, and their bodies were found in the driveway of the property.

It is believed the men's bodies were found about one kilometre away from their intended landing spot.

Police officers talk to people at the scene of the skydiving deaths. ( ABC News )

Police from Camden Local Area Command have established a crime scene and are investigating the incident.

Brad Turner, chief executive of the Australian Parachute Federation (APF), the body that oversees skydiving in Australia, said specialist investigators were assisting police.

"We do have our best investigators on site now assisting the police and the Coroner's Department," Mr Turner said.

"The main focus will be on the equipment as long as it's not too badly disturbed … we should be able to establish exactly what happened with the equipment," he said.

"And whether it was equipment failure or human failure is something that will have to be established over time."

Mr Turner said APF member clubs were strictly audited every year.

It is understood there have been at least another four fatalities involving the Sydney Skydivers centre since 2001 — in December 2012, a skydiver died after a mid-air collision with another man.

ABC News spoke to a person, who did not want to be identified, who dived in the same group as the dead men.

"After we finished our dive, all the instructors got called into a big group," they said.

"When we arrived on the ground we didn't know what had happened.

"I think they must have dived after me."