Australian snowboarder Cameron Bolton was airlifted to hospital on Monday after breaking his neck in a training mishap at the Winter Olympics in Italy.

The Australian Olympic Committee (AOC) said the 35-year-old snowboard cross specialist suffered a serious fall at training on Monday and reported worsening neck pain on Tuesday.

A scan at the Olympic Polyclinic identified two stable neck fractures. Bolton was taken first to a Milan hospital for further imaging and assessment, then to a nearby hotel.

"Cam is in a stable condition and remains in good spirits," the AOC said in a statement on Wednesday.

"The Australian Olympic medical team is working with local doctors and neuro specialists in Australia to determine next steps for further assessment and treatment."

Bolton took silver in the mixed team snowboard cross with Mia Clift at last year's world championships in Engadin, Switzerland.

The AOC said it had enacted the Late Athlete Replacement option, bringing Olympic debutant James Johnstone onto the team alongside Adam Lambert and Jarryd Hughes for the men’s snowboard cross qualifying on Thursday at 4 a.m. ET.

Australia's snowboard halfpipe entrant Misaki Vaughan was also ruled out of the Olympics after suffering a head injury during training on Monday and failing a head impact assessment on Tuesday, the AOC added.

No athlete will replace Vaughan, with Australia to be represented by Amelie Haskell and Emily Arthur in the women's halfpipe qualifying later on Wednesday.