More than 1,000 hoverboards, reminiscent of those made famous by Back To The Future, have been turned away from Ireland over fears they could burst into flames.
The consignment of the two-wheeled, hands-free electric scooters was seized at Dublin Port.
The self-balancing gadgets can cost upwards of €350 and have been banned in a number of cities worldwide.
While not yet banned in Ireland, authorities have "significant safety concerns" over their use here.
The Competition and Consumer Protection Commission said it prevented the consignment from entering the Irish market after an investigation into "unsafe hoverboards".
Examination of a sample of the scooters identified a number of serious safety concerns which resulted in their importation being suspended, the commission said.
Isolde Goggin, chairwoman of the commission, said it is now talking to a number of businesses as part of a further investigation into the sale and supply of hoverboards in Ireland.
"Following the examination, the commission was concerned that consumers may be at risk should the AC adapter/charger or the battery pack overheat and potentially cause a fire," she said.
"Our investigation is ongoing but at this point we are aware that similar products are on sale and we are investigating to determine that these products meet the relevant Irish and EU safety standards."
The Commission said it "strongly urges" anyone wishing to buy a hoverboard to make sure the manufacturer's name or trademark is visible on the packaging and critically that it has a genuine European safety mark.