A police spokeswoman said an investigation into the crash was underway.
The Chronicle has received a number of claims that Mr Bullock ran a red light and hit another car, injuring the driver.
The police spokeswoman said as the crash was under investigation they were not in a position to comment on the cause.
"These are things for the Serious Crash Unit to determine," the spokeswoman said.
Senior Sergeant Shayne Wainhouse said Whanganui Police did not expect any problems with the additional bikers in town for the funeral but had sufficient resources to deal with any issues.