Two cyclists, killed in an alleged hit-and-run along a suburban street on the outskirts of Bristol, have been named as 32-year-old Ross Simons and his wife Clare, aged 30.
Avon & Somerset Police have confirmed that the matter has been referred to the Independent Police Complaints Commission.
It has emerged that police were following a Citroen Picasso shortly before the accident involving a car and a tandem bicycle.
A 38-year-old man is in custody, arrested on suspicion of causing death by dangerous driving. A 35-year-old woman has also been arrested on suspicion of dangerous driving.