Open days at one refugee centre in Hoofdorp and two in Amsterdam have been canceled on police advice follow a string of demonstrations and violent incidents outside centres nationwide in recent days.

Around 180 refugee centres are set to open their doors to the public on Saturday and most will go ahead a planned, refugee settlement agency COA said.

In addition, COA said it taken additional security measures at some centres on police advice and local officials, broadcaster NOS reported. The aim of the open days is to help locals to find out more about how the centres operate and to meet their residents.

Protests against asylum centres and refugee shelters took place in several Dutch towns on Thursday evening, with violence breaking out in the Gelderland town of Doetinchem.

Police there arrested seven people after officers were pelted with fireworks outside the town hall, where councillors were discussing plans for a new asylum centre.

In Nieuwerkerk aan den IJssel, several hundred people demonstrated against plans to house 300 refugees with residency permits and asylum seekers on farmland outside the town.

In Heemskerk, regional broadcaster NH Nieuws reported that at least 300 people gathered to demonstrate outside the town hall during a council meeting, although asylum policy was not on the agenda.

In Noordwijk, where there were angry protests earlier in the week, one person was arrested on Thursday but the protest remained relatively calm. Demonstrations also took place in Haarlem.

The protests come as local councils face mounting pressure from the government to create more housing for asylum seekers, amid a continuing shortage of accommodation nationwide.

Dutch local authorities have urged the caretaker government to act swiftly to address problems around accommodation for asylum seekers, warning that local councils are being left to cope “on their own.”

Meanwhile the damage caused to the Dutch parliamentary complex during last weekend’s riots during an anti-immigration protest in The Hague has been put at €55,000.