An investigation into a sidecar competing in a fatal practice on Tuesday has been described as "standard practice".
The Auto Cycle Union (ACU) impounded and released a sidecar ridden by Simon Neary and Jason Crowe.
Two other competitors, Bill Currie and Kevin Morgan, were killed during a practices on Tuesday evening.
The ACU said the impoundment was standard practice and Mr Neary and Mr Crowe can continue riding in the TT.
An investigation into the incident continues.