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.
Fresh calls for update to 90 year old housing standards
Guernsey's President of Environment and Infrastructure has issued fresh calls for introducing housing standards in the island.
Guernsey FC get ready to play last game at Footes Lane
After 11 years, and 269 games, GFC will bid farewell to Footes Lane - where the club was formed.
German Youth Orchestra to join Guernsey's Liberation Concert
Young musicians from Biberach will join Guernsey residents in concert this May.
Islander creates Guernsey AI platform
An enterprising islander has created a new AI chatbot that deals with everything Guernsey.
Guernsey CWGSY emails targeted in phishing scam
The Office of the Data Protection Authority says a series of fake telecoms bills are being sent to islanders.
Island Energy to face charges over fatal Haut du Mont explosion
Jersey's gas company, Island Energy, faces charges over the explosion on Pier Road in St Helier in December 2022 which killed ten people.
Woman (78) dies following collision in Guernsey
A 78-year-old woman has died following a collision on Rue des Landes.
Cost of sending a letter to the UK from Guernsey will rise by by 14%
Guernsey's postal tariffs will change 1 April 2025.
