A 28-year-old man has been arrested on suspicion of murder after the discovery of a man's body partly submerged in the River Taff in Grangetown, Cardiff.
The dead man has been named as David Alun Lewis, 45, from Ystrad Mynach.
Police were alerted by an anonymous call made just before midnight on Wednesday from a phone kiosk on Clare Road, Grangetown.
A post mortem examination is continuing to find the cause of Mr Lewis' death.
More top news
Showers will clear this evening to leave a largely dry night with clear skies. Temperatures expected to tumble with a risk of frost in parts
Watch our report with the rugby region's stars, who were feeling the heat in some very specialist pre-season training today.
As it's announced that response times will be axed for most 999 calls, our Health and Social Affairs Correspondent assesses what it means.