Isle of Man rider Dean Martin has sadly died following an incident during practice for the Pre-TT Classic Races.
The 58-year-old, from Santon, came off at the Billown Dip on Friday evening. He leaves behind a partner, Hilary.
A second rider involved, Jamie O'Brien from Liverpool, has been flown to Aintree Hospital in Liverpool for treatment. He is said to be 'serious but stable'.
Two course marshals were also caught up in the incident. One suffered a head injury and has also been taken to Aintree Hospital, while the second marshal is due to be released from Nobles Hospital in Douglas after being treated for ankle and shoulder injuries.
A statement issued by the organising Southern 100 Club on Saturday said: “The Southern 100 MCRC, organisers of the Blackford's Pre-TT Classic Road Races, regret to announce the death of Dean Martin, from Santon, Isle of Man following an incident at Billown Dip during the 850cc Classic Practice on Friday evening.
“Dean, 58, was a long time competitor on the Billown Course on classic and modern machines leaves a partner Hilary.
“Southern 100 Racing extends it sincere condolences to family, relatives and friends at this very sad time.
“The organisers are carrying out a full investigation into the circumstances of the incident. The Coroner of Inquests has been informed.”