Police say the man, who's not yet been named, died at around 6.40pm on 18 September.
Police say the 66-year-old died in a single vehicle accident on the track to Fort Clonque, at Alderney's south-western tip.
They say as investigations are carried out there will be a police presence in the area and ask people to stay away.
Condor to be rebranded as Brittany Ferries
It's been confirmed that Condor Ferries will be rebranded from next year as its majority shareholder Brittany Ferries.
Bid to buy Barclays' Sark properties falls through
The Sark Property Company put up £20M for the homes, hotels and land but this was turned down by the trustees of the late Sir David Barclay.
New political movement launches in Guernsey
The founders of Future Guernsey carried out research that they say shows Guernsey's current political system is failing.
