New tensions flared in the Netherlands Sunday over the sensitive issue of taking in migrants, only hours after Dutch Prime Minister Mark Rutte sharply condemned a "cowardly" attack on a refugee shelter.

Police were forced to intervene in the central city of Utrecht on Sunday when hundreds joined a rally organised by the far-right German PEGIDA movement, short for "Patriotic Europeans Against the Islamisation of the Occident".

Some 10 people were arrested after a smoke bomb was thrown and scuffles flared between PEGIDA supporters and those demonstrating against the group, Dutch media reported.

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