In 2009, a man was arrested in Ireland after Slovakian security placed explosives in his luggage for training purposes and forgot to remove them. – WTF Fun Facts
Source: http://edition.cnn.com/2010/WORLD/europe/01/06/slovakia.ireland.explosives/index.html
Fun Fact Slovakian Airline Cruel Joke
In another similar case Slovak security officers left heroin in a truck traveling to Turkey and again forgot to remove it. The that time interior minister Mr Kalinak did not consider resigning his post.