South Wales Police are appealing for witnesses after an incident which occurred in Penarth at around 11.30pm last night.
A male cyclist was travelling along Lavernock Road, where he was involved in an incident which resulted in him coming off his bike.
He was taken to the University of Hospital for Wales where he is receiving treatment.
Police are asking anyone who may have witnessed the incident, or the manner in which he was riding beforehand, to contact them.
A cyclist remains in a "serious" condition in hospital following an accident in Penarth in the Vale of Glamorgan.
The man was thrown from his bike on St Augustines Crescent at its junction with St Augustines Road on Wednesday.
South Wales Police say he has now been identified and his family and next of kin are being informed.
Witnesses are asked to call 101 quoting reference number 1400256228.
Police are appealing for information to identify a cyclist injured in an accident in Penarth.
The man, who is believed to be between 25 and 30 was thrown from his bike on St Augustines Crescent at its junction with St Augustines Road at around 5.40pm today.
South Wales Police say he is around six foot tall, of slim build, with short brown curly hair and is unshaven with a short moustache. He has a 'sizeable scab' on his left elbow and wearing a black, red and grey 'Muddy Fox' cycling top with 'MFX' on the bottom, white and navy Nike shorts and black Nike trainers.
The cyclist has a grey and black 'Trax' brand cycling helmet and his bike is a Globe hybrid pedal cycle, which is silver.
Police say he is being treated for his injuries at the University Hospital of Wales in Cardiff.
Anyone with information is asked to contact South Wales Police on 101 quoting incident number 669.
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A pedestrian has been injured by a shop front sign falling in strong winds in the Vale of Glamorgan. It happened in Windsor Road in Penarth town centre this lunchtime. One person suffered minor injuries.
Three people have been injured by a shop front sign falling in strong winds in the Vale of Glamorgan. It happened in Windsor Road in Penarth town centre this lunchtime. It's understood none of the injuries are serious.
Service update - All services in Penarth Town Centre diverted via Plassey st and Albert Rd due to a police incident on Windsor Rd.
Viewers footage: Roy Blackburn and Julia Shearn
South Wales Fire and Rescue Service have told ITV News that they have reassessed the cliff fall in Penarth, and now believe 150 tonnes was involved in the landslide. That's five times their initial estimate.
No one is believed to have been injured, but emergency services are warning people in the area to keep away from cliff edges.