The helmet of a base jumper who died in Victoria on Saturday may have been removed before emergency services arrived on the scene, along with an attached camera.

They are appealing for information after the 23-year-old New South Wales man's body was found near the Omega Tower, at Gifford in Gippsland.

Police initially said the death was the result of a "parachute" incident.

They now say the man may have been with other people before he died, but that there was no-one at the scene when they arrived.

"There is a mount for a camera attached to his helmet, but no camera was found at the scene," a police spokesman said.

"When police arrived at the scene, we found that the person's helmet had been removed. We believe that's happened post-impact."

The spokesman says someone may have fled with the camera and he has appealed for them to come forward.

"What's happened at the scene is not so important as what's happened afterwards and you should be helping your friend [by helping to] put this together," he said.

Base jumpers leap from fixed objects and use a parachute to break their fall, an activity that is often deemed illegal.

The 427-metre-tall tower is the tallest object in the southern hemisphere and is a known site for illegal base jumping.

It was originally used for submarine communication but was decommissioned in 2008.