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.
Patrols at La Valette bathing pools after recurring antisocial behavior
Police have been made aware of recurring antisocial behaviour at La Valette Bathing Pools.
Enhanced protection for Sark's sea life
Sark's government wants enhanced Marine Protected Area status for its territorial waters.
Skeleton of new Guernsey golf resort built
The transformation of La Grande Mare is 'progressing well'.
Prominent Guernsey man appointed Commissioner for Standards
Architect and long-time community stalwart Andrew Ozanne will oversee any interim complaints about politicians.
Record festive parcel delivery for Guernsey Post
Christmas parcel volumes are up 2% on last year at more than 700,000 individual items.
Channel Islands Ferry Operators Working Group expands
DFDS and the States of Jersey have confirmed their interest in joining the Ferry Operators Working Group to improve sea travel between Guernsey and Jersey.
Sculpture to remember the Alderney evacuees
Fundraising is underway for a permanent memorial to the Alderney evacuees who never made it home after the war.
Channel Islands could technically have a White Christmas
Wintry showers are predicted for 25 December 2025 and if just one snowflake is recorded, the islands will technically have a White Christmas.
