"A lovely sunny day" at the Liberty Stadium ahead of the Swans/Manchester City match, tweets Lynn Courtney.
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Gruffydd Wyn Roberts, a 22-year-old from Amlwch on Anglesey, received a standing ovation as he performed Nessun Dorma.
A second man who tried to help at the incident was also taken to hospital
Police in Cardiff are appealing for witnesses after a man was confronted by a burglar carrying a knife.