Two dead pigs have been removed by police from the site of a proposed centre for 500 refugees in the south of the Netherlands – the second time that pig carcasses have been used to send an anonymous anti-immigrant message.

One pig was hung by a chain from a tree next to a building earmarked for the centre near Heesch – population of about 12,000 – which the local town council conceded on Tuesday would probably have to remain open for about a decade. The second carcass was dumped on the roof.