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.
Loganair steps in to take some Blue Islands routes
The Scottish regional airline Logainair is stepping in to take over some routes operated by Blue Islands which has suspended operations.
Blue Islands cancels upcoming flights as airline ceases trading
Blue Islands has operated its final flights after it failed to get a last-minute lifeline from Jersey's government.
Simon Calder: 'To lose one airline is unfortunate, two looks like carelessness'
Travel journalist Simon Calder says there are questions to be answered on whether regional airlines receive enough support, after Blue Islands and Eastern Airways collapsed a few weeks apart.
Guernsey creative David Robilliard awarded Blue Plaque
A Blue Plaque in Market Square hopes to inform more locals about the life and work of David Robilliard.
Guernsey Conservation Volunteers win King's Award
The King's Award recognises three decades of volunteer effort to remove invasive plants from the coast and countryside.
Winners pick up awards for providing Guernsey's best customer service
Winners and nominees pack the OGH for the 2025 Norman Piette Customer Service Awards.
Guernsey Water unveils £130M plan to transform island infrastructure
Guernsey Water plans to renew and replace century-old infrastructure but bills will rise above inflation to fund it.
St Martin’s Point in Guernsey gets a solar upgrade
A navigation light off Guernsey’s south-east coast will be powered by the sun.
