The Chernobyl Kilkenny Outreach Group truck has been robbed and vandalised over the weekend.
The delivery of supplies was due to head out to help Chernobyl refugees in Belarus next weekend but this has now been thrown in jeopardy.
Hundreds of boxes of nappies are believed to have been stolen and much of the rest of the load has been destroyed or thrown about.
The collection of much-needed supplies took up to five months to put together.