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.
Extra Aurigny ATR lands in Guernsey
Former Blue Islands plane will enhance Aurigny's regional fleet.
Guernsey charity to open a shop at Oatlands
The Planning Authority will lift a covenant to allow Les Bourgs to set up a children's charity shop.
Smartphone survey for Guernsey schools
Amid global interest, the States is asking researchers to study how devices impact students’ lives in Guernsey.
Food waste prevention app launching in Guernsey
SOS Food Angel is launching in Guernsey to reduce food waste and help households access affordable food.
Advice for Guernsey university students following UK meningitis outbreak
Islanders should be aware of the symptoms of meningitis following a fatal outbreak in the UK.
High alcohol consumption in Guernsey seen as normal
High levels of alcohol abuse and medicinal cannabis misuse are key findings of new strategy.
Guernsey pupils find the purr-fect way to practise reading
Who knew that felines in the GSPCA's cattery enjoy a good book?
Teams decided for de Putron Final 2026
The schools that will represent their island in the the final of educational quiz the de Putron Challenge have been decided.
