Kyle Sieniawski's family have announced their 'little superhero' has died (Image: Family handout)

A 14-year-old from Pontypridd who was the youngest person to be diagnosed with motor neurone disease (MND) has died. Kyle Sieniawski was diagnosed with the most common and most aggressive form of MND, amyotrophic lateral sclerosis (ALS), aged just 13.

Kyle's family shared on Facebook that their "little superhero" had died on Thursday, November 27. They had previously said Kyle had been moved to intensive care after developing an infection which left him very poorly earlier in November.

Kyle's family posted on the Facebook page where they have shared Kyle's journey on Friday to say: "We're absolutely heartbroken to announce that our little superhero has very sadly lost his battle with

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