Virtually all insurance companies active in the Netherlands are members of the Dutch Terrorism Damage Reinsurance Company (NHT). OOM is also a member. This means there is coverage under NHT terms, which involves the damage being reimbursed at cost, in principle.
But if the cost for all victims in the Netherlands combined exceeds a certain amount, the total payments will be only to that amount. If the damage claims of all victims exceed that amount nonetheless, they will receive a smaller payment based on a percentage that is the same for everyone.
More information about this can be found at nth.vereende.nl (dutch only). The site also features a list of insurance companies that are part of the NHT. You can also ask your own insurance company about its coverage for expenses resulting from terrorism on your national health insurance, additional insurance and/or travel insurance.
The OOM Temporary Residence Abroad Insurance, OOM Living Abroad Insurance, Global Traveler and Young Global Traveler Health Insurance and SOS insurance policies provide coverage for expenses resulting from terrorism under NHT terms.
Note: You cannot apply for Global Traveler Insurance anymore.