At least 30 Islamic organisation have either requested funding or actually received money from Kuwait and Saudi Arabia over the past few years, according to research by the NRC and television current affairs show Nieuwsuur.

Kuwait and Saudi Arabia have been providing the Netherlands with confidential information about funding through diplomatic channels since 2010 and the Nieuwuur claim is based on three separate lists detailing the requests.

Funding by conservative Gulf states is controversial because of the links with the fundamentalist stream of Islam know as Salafism.

Four years ago there were 13 Salafist mosques in the Netherlands but this has now risen to 27, according to information collected by the counter terrorism unit NCTV. The number of Salafist preachers has more than doubled from 50 to 110.

These figures too were confidential and Nieuwsuur said it is notable that they exist because prime minister Mark Rutte has told parliament in the past that it is impossible to draw up a list of Salafist-linked organisations in the Netherlands.

The council of Moroccan mosques in the Netherlands has called on Islamic institutions to come clean about their funding. In addition, the government included a pledge to increase the controls on funding from ‘restrictive states’ but has not yet presented any plans to do this.

Nieuwsuur and the NRC did not say how much money is involved, but they did give the example of the De Al Fath mosque in Dordrecht which has received €88,888 from Saudia Arabia.