Presidential Spokesperson Ibrahim Kalın said Saturday that Turkey condemned Germany for allowing a PKK march and openly supporting terrorism.

Axar.az reports that, Kalın also stated that with the latest scandal march in the city of Frankfurt, Turkey observed once again that some European countries were trying to intervene in the upcoming referendum on constitutional reform openly backing the "No campaign."

German officials Saturday allowed terrorist PKK followers to march in Frankfurt, in marked contrast to its recently blocking Turkish ministers and politicians from addressing Turkish voters in the country.

Around 9,000 people marched in the central German city of Frankfurt with banned PKK posters and flags, openly defying the federal government's prohibition of terrorist symbols in public places.

The PKK sympathizers also carried banned posters and flags and shouted slogans against Turkey, even though the Interior Ministry on March 2 updated its list of prohibited PKK symbols to include the image of the terrorist organization's jailed head Abdullah Öcalan.

A Frankfurt police statement said the group was permitted to carry out celebrations of Nevruz -- a spring new year festival -- in two parts of the city Saturday, adding that the main topics of the meetings were Nevruz, "Freedom for Öcalan," and "Freedom for Kurdistan."

This comes despite German authorities blocking nearly two dozen planned rallies by Turkish government ministers or politicians ahead of an April 16 referendum on constitutional changes in Turkey.

The moves have drawn Ankara's ire, with President Recep Tayyip Erdoğan comparing the move to Nazi-era practices.