http://nos.nl/artikel/2016194-nos-re...endringer.html (Warning: it's all in Dutch)
Around 8 p.m. local time (at the same time as the news is usually broadcast) an unknown man armed with a pistol entered the broadcasting station of the Dutch NOS and demanded he be given air time to broadcast a speech of his. The man claimed that he (as well as other members of an as of yet unidentified hacker group) had 'important things to say', that they 'had been hired by intelligence agencies' and that they had heard things 'which casted doubt on society'. (I'm probably mistranslating this to some extent, the original quotes are in the link (in Dutch ofc)). The man apperantly carried a letter talking about explosives as well, so the police are searching the building.
The man has been arrested by the police. No shots have been fired. Since the man was in the studio with a running camera at the time of the arrest, there is a video of him walking around, talking to a hostage about the situation and his eventual arrest.
If this is insufficient information for a discussion, please close this thread. It's the first time I'm creating one of these, so I don't really know what I should add.
EDIT: The letter seems to have claimed there are eight nuclear bombs spread throughout the country, so the police searching the building might be unrelated to the supposed explosives.
EDIT 2: link to article in English: http://www.nltimes.nl/2015/01/29/arm...ation-hostage/