Homes have been evacuated and several streets closed after what is though to be anti-tank mines were discovered by a Sussex resident digging in his garden.
Police are advising drivers to avoid Westhampnett, near Chichester, for the time being.
A cordon remains in place in Stane Street where the Second World War ordnance was unearthed in a box in the ground at 10.50am today, Tuesday, July 4.
A 200-metre cordon was established to keep people safe and some local houses were evacuated, Sussex Police said.
Stane Street, and adjacent Coach Road and the amenity waste disposal site are currently closed whilst a military ordnance disposal team at the scene arranges safe removal and disposal of the items.
Police are advising drivers to avoid the immediate area.
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