Nick asks members of the public not to share photos or videos of the incident on social media
The father of sidecar competitors Ryan and Callum Crowe say the brothers have fractures and a head injury but there is no risk to their lives.
The update was made by Nick Crowe on Facebook late last night.
During TT qualifying, the duo came off on the first lap in Crosby resulting in a red flag.
In another post, Nick is asking that people not share videos or photos of the incident on social media.
He says they don't want to damage the event, which is hugely under scrutiny, adding they'd like to keep the sidecar class going.
"We can't keep them safe" says mum calling for more mental health support
Tevir plans further work on derelict Castle Mona
Well-regulated finance sector 'important for everybody'
Two people step forward to join Ramsey Commissioners
No fractures or soft tissue damage for Michael Evans