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.
Teen jailed for sending explicit messages to children
A Guernsey teenager who sent explicit messages to children under 10 has been jailed for nearly three years.
New website to catalogue Guernsey States work
A new website has launched to publish information and updates about the work of Guernsey’s parliament.
Guernsey swimmer plans to cross the Irish Sea for charity
A man who calls Guernsey home plans to swim 21 miles from Northern Ireland to Scotland.
Guernsey's diving platform to reopen
The diving platform at the Bathing Pools will reopen following a 'concerted effort from the community, government and the private sector.'
Further delay to opening of Guernsey's specialist care units
Completing remedial building work on the Critical Care and Post Anaesthetic Units at the PEH is over running by around nine months.
Guernsey’s Old Quarter becomes street art hotspot
Vibrant street art is being used as a catalyst for the regeneration of St Peter Port's Old Quarter.
Sark man jailed for trying to meet and sexually abuse children
A man living in Sark has been jailed for 12 years for multiple sexual offences against children, including travelling to try and meet and abuse them.
Missing Guernsey child found
Guernsey Police have confirmed the schoolboy who was reported missing since yesterday morning (24 June) has been found.
