The area of New Street near Goodram Drive was closed for over two hours yesterday while police investigaged a crash of a group of nine cyclists.
When the road reopened, the conclusion seems to be that the group crashed into itself.
Halton Regional Police were called about 7:30 Saturday morning.
Police say that three cyclists ended up falling off the bikes as a result. Two of those cyclists sustained minor injuries but the third sustained much more serious injuries.
That cyclist, believed to be a man in his 60s, was rushed to Hamilton General Hospital in critical condition.