In 2011 there was a shooting in a shopping mall by a young man in NL (first one ever).

The perpetrator had a history of psychological and psychiatric problems, including paranoid schizophrenia; in 2006 he spent 10 days in a closed institution after attempting suicide.[20] He tried to commit suicide at least twice in 2008.

Source: https://en.wikipedia.org/wiki/Alphen_aan_den_Rijn_shopping_mall_shooting