Army explosives experts have carried out a controlled detonation of a suspicious item found at the household waste recycling centre in Bedford Road in Petersfield in Hampshire.
The site will remain closed for the rest of the day while investigations continue, but the exclusion zone covering adjoining roads has been lifted. Police said there is no risk of danger to the public.
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Freezing conditions have caused 24 hours of cross-channel travel chaos - which is set to continue into tonight.
The icy conditions has put a strain on many services in the South, especially those that help the elderly.
School children in Hampshire are performing the story of Mary and Joseph using songs by Take That.