Four rhino heads with horns worth a total of £428,000 if sold to make Chinese medicine, were stolen from a museum's archives.
Three masked men broke into the National Museum Archives in north Dublin on Wednesday night and tied up a security guard before making off with eight horns.
The 100-year-old horns had been placed in storage after a spate of similar thefts from museums and private collections in Europe. Powdered horn is used for medicine in China and Vietnam, although it has no medical value.
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