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.
Move to get a full size inflatable pool for Alderney
Alderney man Paul Clark says the three lane pool is ready for a summer home.
Three Guernsey seal pups released in spring sunshine
The GSPCA has released three of the pups it has been caring for over the winter.
Work begins to clear fallen trees from Guernsey's Reservoir Walk
Islanders will have to wait until mid-April to once again walk around the reservoir, as storm cleanup begins.
Guernsey Police to target drivers who put others in danger
Police say a 'worrying' number of drivers are ignoring zebra crossings and red traffic lights.
A standard Guernsey bus ticket to rise to £1.70
Fares will go up in late March to maintain the balance between States funding and passenger contributions.
Guernsey parents urged to reduce screen time for young children
The States “Screens Away, Time to Play” campaign explains the negative impact of excessive screen time on under-4s brain development and suggests alternatives.
Guernsey's mail plane service to end in July
Guernsey Post blames increasing costs for the decision to route mail by sea.
CI trade body warns of building delays after SGB shuts
The GBTEA says the loss of the hire firm and 25 jobs will test the building industry short term.
