A man was found with serious injuries in the subway of a Welsh train station.
Police were called at 1am on Friday after the injured man was found at Tonypandy railway station.
A spokesman said he had been taken to hospital with serious injuries.
The subway is currently sealed off as police investigate.
Rail passengers using the station this morning are being told they need to use the Trealaw entrance.
One rail passenger said there was a "lot of police activity" at the station this morning.
A spokesman for the Welsh Ambulance Trust said they were called just before 1am to reports of a man "needing urgent medical attention".
They said that he was taken to the Royal Glamorgan Hospital for treatment.
Anyone with information should contact police on 101 quoting occurrence 1900421624.
