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 came round a bend during the Severn Bridge Road Race.
Here is Acting Inspector Darren Jarvis...
More top news
More than a thousand people have signed a petition to try to prevent a Bristol family being split apart by the Home Office.
As Hollywood hit the red carpet for the "Fury" premiere on Sunday, Brad Pitt paid tribute to his unusual co-star; a WWII tank from Dorset.
After smashing the competition in the final of the U.S Open this weekend, squash player Mohamed Elshorbagy has been made the world #1.