Alarm clocks blew up at IKEA locations in France Belgium and the Netherlands late on Monday, with two workers suffering minor injuries.
Explosives concealed in alarm clocks were set off simultaneously at shops in Ghent, Belgium and Lille, France, and in a bin outside the store in Eindhoven, in the Netherlands.
"The information we have is that the explosions happened the same way in all locations, with booby-trapped alarm clocks that had been hidden exploding," the New York Daily News quoted An Schoonjans, spokeswoman for prosecutors in Ghent, as saying.
We are in contact with judicial authorities in Eindhoven and Lille to see if there is a link between the three affairs."
A security guard and an employee at the Ghent store suffered earaches, but no other injuries were reported.
It is not believed that those who planted the explosives intended to cause significant injury, and nothing was found at any other IKEA locations.
"Federal police with dogs did a sweep of other stores but there was nothing suspect that was found," Schoonjans, a Ghent told Reuters.
The Local reported that, according to Belgian news agency Belga, two alarm clocks exploded in in the warehouse in Ghent, following a warning.
IKEA risk manager Edwin Gaasenbeek said the incidents were not considered to be blackmail or extortion, and there was no reason for extra security measures. All three shops were open for business on Tuesday.
Two men were jailed for planting bombs at two Dutch IKEA stores in 2002 and trying to extort money.