Dutch riot police broke up a protest by hundreds of backers of Turkish President Tayyip Erdogan demonstrating at the Turkish consulate in Rotterdam.
Police dressed in riot gear and on horseback attempted to disperse the crowd after a series of diplomatic incidents between Turkey and the Netherlands.
Demonstrators had gathered to show support for the Turkish government after the foreign minister and family affairs minister were prevented from campaigning for the referendum next month.
German Chancellor Angela Merkel has backed the Netherlands in its diplomatic fight with Ankara while the EU has urged Turkey to calm down.
A diplomatic row between Turkey and the Netherlands has broken out but what is it all about?
Turkey's president described the Dutch as "Nazi remnants" and "fascists" after his Foreign Minister's plane was denied landing permission.