Police questioning a 38-year-old man on suspicion of killing a married couple in an alleged hit-and-run have been granted more time to quiz him.
The suspect, who has not been identified, handed himself in to police hours after Ross and Clare Simons were killed.
Mr Simons, 34, and his 30-year-old wife - described by friends as "two peas in a pod" - died when their tandem bicycle was in collision with a Citroen Picasso car in Hanham, near Bristol, on Sunday.
Less than 24 hours earlier, they had celebrated the news that they could undergo fertility treatment to start a family.
An Avon and Somerset Police spokesman said: "Officers questioning a 38-year-old man on suspicion of death by dangerous driving have been granted further time to question him.
"A woman, aged 35, also arrested, has been released on police bail pending further inquiries.
"House-to-house inquiries continue and officers continue to appeal to anyone who witnessed this collision, or anyone who saw a blue Citroen Picasso in the area shortly before, to contact us on 101."
Mr and Mrs Simons died at the scene of the crash on Lower Hanham Road.
The car was speeding moments before the incident and officers indicated for it to pull over, but were forced to follow it after it sped off. Moments later the car struck another vehicle before colliding with Mr and Mrs Simons's tandem.
Their families paid tribute to them in a statement, which said: "Both of our families are completely devastated by the tragic events that took Ross and Clare from us. A very special couple have been taken from us and we have no words to describe our loss."
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