Gardaí have uncovered a large quantity of what was described as "high quality" home-made explosives during a search of waste ground in Co Louth.
Approximately five kilos of the substance, which they believe to be ammonium nitrate, was found in a rucksack on waste ground in the Killeen area yesterday afternoon.
A Defence Forces bomb disposal team were called to the scene, which is some five kilometres outside Dundalk.
A Defence Forces spokesman said it appeared to be "high quality home made explosive" and it was removed for further examination.
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The area has been sealed off pending further searches this morning.