Organisers say the person was treated at the finish line before being taken to hospital.

A Run 4 Wales spokeswoman said in a statement that it was with "deep regret" that they confirmed the death of one of this year’s participants at the annual Cardiff Half Marathon

A runner who died after the Cardiff Half Marathon has been described as "a wonderful son, loving partner and wonderful father". Stephen Jenkins was "the glue among all his friends", his family said in a statement. The 37-year-old passed away at University Hospital of Wales in Cardiff after collapsing at the finish line.

Stephen Jenkins, who collapsed at the finish line of the Cardiff half marathon and died in hospital, has been described as a "wonderful father" and "genuinely kind person"

A Cardiff Half Marathon runner who collapsed at the finish line has died in what organisers have described as a ‘terrible tragedy’. The runner, who has not been named, was rushed to hospital but later pronounced dead after completing the UK’s second largest half marathon.

Stephen Jenkins passed away at the University Hospital of Wales, Cardiff, after collapsing at the race's finish line. | ITV News Wales

A runner in Cardiff’s half marathon has died after collapsing at the finish line of the event. The race hosted over 29,000 participators in its biggest ever event, with the streets of the city flooded with runners over a 13 mile stretch.

A runner taking part in Cardiff's half-marathon died after collapsing at the finish line, it has been confirmed, Run 4 Wales said that it was with "deep regret" they confirmed the death of one of this year’s participants at the Cardiff Half Marathon.