Four men and a woman have been arrested after two random stabbings in Hereford left two men seriously injured.
Police say they can find no motive for the attacks and have described them as vicious.
They believe the stabbings could be linked with a murder 140 miles away.
Victoria Davies reports.
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It will be a dry and bright start, however scattered showers will develop.
Rather cloudy, with some rain likely at first.
It's believed there were around 8,000 people who laced up for this year's 10k race.