Dutch police said they had arrested at least 21 people during a fourth night of unrest over coronavirus measures, although the situation had calmed down.
Prime Minister Mark Rutte has slammed the days-long spree of "pure violence" by "idiots", and warned that more Covid restrictions are on the cards.
Small groups caused trouble in Zwolle, Groningen and Roosendaal last night though not on the scale of violence that rocked major cities at the weekend.
Police in the northern city of Zwolle arrested 13 people after declaring an emergency situation to prevent what they said were planned riots, local police said on Twitter.