A 23-year-old man arrested following an alleged racially aggravated public order offence at the Liberty Stadium has been released on conditional bail.
South Wales Police are continuing to investigate the incident which took place during yesterday's game between Swansea City and Norwich.
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Organisers say there will be increased security at the Urdd National Eisteddfod, which began in Bridgend today.
Any remaining heavy or thundery showers will clear eastwards this evening.
Over 70 firefighters are currently tackling the fire, which is now confirmed to be at a scrap yard.