Threatening graffiti featuring Nazi symbols has been sprayed on to the front of a centre for asylum seekers in Denmark.

The graffiti, which read 'this is the first warning', was sprayed across the front of the building alongside a swastika, with a minivan belonging to the centre also set on fire.

The spray painting also featured the letter DNSB, an abbreviation for Denmark's National Socialist Movement.

The asylum centre in Lyngbygaard in Denmark which was vandalised with Nazi graffiti sprayed over it

The spray painting also featured the letter DNSB, an abbreviation for Denmark's National Socialist Movement

The vandalism of the centre in Lyngbygaard comes amid a rise of attacks on migrants across Europe.

The centre hosts 120 asylum seekers and according to the Local, it is the third such attack on the facility in recent months.

In the previous incidents DNSB was also spray-painted on the building.

The first two attacks were written off as pranks but now police are investigating whether they were all politically motivated.

The incident comes just days after two drunken men broke into a refugee housing block and set fire to it in Leipzig.

Meanwhile German Chancellor Angela Merkel has warned that the migrant crisis could become a bigger challenge for the European Union than the Greek economy.

As well as being vandalised, the culprits also torched and destroyed the centre's minibus

It came as she addressed the issue of asylum seekers as she condemned a recent surge in attacks on refugee shelters in Europe.

Nearly a quarter of a million have crossed the Mediterranean to Europe this year, according to the International Organisation for Migration.