Expatica's Dutch news in English: Threat 'substantial' says new Dutch anti-terror site:
"The chance of an attack in the Netherlands is very real, according to a new website launched by anti-terrorism coordinator. A message on the homepage of the site (www.nctb.nl) said it was unlikely the current threat level of 'substantial' could be reduced in the near future. The four alert levels in the Netherlands are: minimal, limited, substantial and critical. The website was launched on Friday and gives up-to-date information about the national anti-terrorism coordinator's assessment of the level of threat." [Snippet]