"We have positive lines of enquiry. Extra police are on duty around the area but I'd like reassure people this sort of incident is very rare and Dumfries remains one of thesafest places to live in the UK."
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A Cumbrian man has been jailed for 15 years after a police crime unit seized its biggest ever haul of firearms.
The historic event always takes place on the last Friday in July.
Early enquiries suggest the men may have taken the drug Blue Valium. Two of them remain in hospital with breathing problems.