The Netherlands barred Turkey's Foreign Minister Mevlut Cavusoglu from flying to Rotterdam on Saturday and President Recep Tayyip Erdogan responded by calling his NATO partner a "Nazi remnant" as a row over Ankara campaigning among emigre Turkish voters intensified.
Rotterdam had banned Cavusoglu from attending a Turkish rally in support of Erdogan's drive for sweeping new powers, to be put to a referendum next month, Reuters reported.
The Dutch are due to vote in a national election on Wednesday, in which anti-immigration sentiment has played a prominent role with nationalist candidate Geert Wilders calling Erdogan a dictator.
Cavusoglu had said on Saturday morning he would fly to Rotterdam anyway and accused the Dutch of treating Turkish citizens in the country like "hostages".
"I sent them so they could contribute to your economy ... They're not your captives," he told CNN Turk television.
