Anonymous racists have sent a toy truck to The Hague’s As-Sunnah mosque along with a letter threatening ‘revenge’ for recent attacks by supporters of the so-called Islamic State.

The letter was delivered to the mosque in the run-up to Eid, when large numbers of Muslims gather to celebrate the end of the fasting month of Ramadan.

Mosque leader Abdelhamid Taheri told Omroep West: ‘We kept it quiet until after the holiday to avoid causing tension, but there were extra police guarding the mosque [on Sunday].’

In true Dutch tradition, a large chunk of the letter is taken up by unsolicited advice: ‘Protest a bit harder against your violent friends and leave radicalism behind, otherwise Europe won’t be pleasant for you.’ The writer threatens to attack a school or mosque with a vehicle every time a ‘cowardly attack on our citizens and children’ is carried out.

Taheri said there was ‘great anxiety’ in the Muslim community about potential threats. ‘We shouldn’t underestimate it, this is more than just a public nuisance,’ he said. ‘We have also tightened up our own security measures.’