Ukraine is demanding an apology from Hungary after Prime Minister Viktor Orban was seen wearing a scarf that appeared to show parts of western Ukraine in a map of Hungary.

The Hungarian Ambassador to Ukraine, Istvan Igyar, was summoned to the Ukraine Ministry of Foreign Affairs on Tuesday.

The ambassador was told that it was “unacceptable for the Prime Minister of Hungary Viktor Orban to appear in public wearing a scarf with the image of Hungary with a part of Ukrainian territory,” according to a statement from the Ukrainian Ministry of Foreign Affairs.

“The attention of the Hungarian diplomat was drawn to the fact that such actions do not contribute to the development of good neighborly relations between Ukraine and Hungary,” MFA spokesperson Oleh Nikolenko said.

Orban was pictured on his Instagram wearing the scarf at a "friendly" or unofficial football match between Greece and Hungary on Sunday.

The map on Orban’s scarf appeared to represent Greater Hungary as part of the Austro-Hungarian Empire, which was defeated in the First World War. It also includes parts of Romania, Slovakia, Serbia, Austria, Croatia and Slovenia. 

A Romanian member of the European Parliament, Alin Mituta, called it an “irresponsible act” by Orban. 

“It's a revisionist gesture that puts Orban alongside Putin, who also dreams of border changes. He should be sanctioned and isolated by EU leaders in the European Council,” Mituta said on Twitter.