Avon & Somerset Police are appealing for spectators with video or photos of the fatal accident to contact them.
The crash happened as 23-year-old cyclist Junior Heffernan from Yelverton in Devon came round a bend during the Severn Bridge Road Race.
Here is Acting Inspector Darren Jarvis...
Investigations are continuing into an accident during this weekend's Severn Bridge Road Race, in which a rising cycle star was killed.
23-year-old Junior Heffernan from Yelverton in Devon died after colliding with a car at the side of the road as he came round a bend.
A cyclist has died while competing in the Severn Bridge Road Race in Gloucestershire. 23-year-old Junior Heffernan from Yelverton in Devon was involved in a collision with a car during the race yesterday (Sun).
It happened on the third lap of the 10-lap race, which was immediately abandoned.