“Almost all available riot police in the Netherlands were on duty. It was a truly maximum deployment that lasted for much of the night,” acting police chief Willem Paulissen said in a statement.

The emergency number 112 was briefly overloaded shortly after midnight, mainly because of the volume of fire reports. Major blazes included a fire that destroyed the Vondelkerk in Amsterdam, a sports hall in Bedum and a mattress shop in Hillegom.

Hospitals reported a heavy inflow of patients. The burn centre at the Martini hospital in Groningen treated 19 patients, about twice as many as last year, including 10 children under 15.