A rider has died and another has been seriously injured in a crash during the pre-TT races.
Organisers Southern 100 Racing said Dean Martin, from the Isle of Man, died in a crash with Jamie O’Brien on the Billown course in the 850cc classic practice on Friday.
Mr O’Brien, from Liverpool, and a marshal who was also badly hurt, were flown to the city’s Aintree Hospital.
The opening practice session of the main TT races starts at 18:00 BST.
A second marshal suffered ankle and shoulder injuries in the crash at Billown Dip but is expected to be discharged from hospital later.
Southern 100 Racing said Mr Martin, 58, from Santon, was a long-time competitor on the Billown Course on classic and modern machines, and leaves behind his partner, Hilary.
It said the race was abandoned and it was carrying out a full investigation into the circumstances of the crash.