Photo from UNIAN

Ukrainian Minister of Foreign Affairs Pavlo Klimkin has condemned the burning of Poland's national flag in the center of Kyiv, calling it an act of provocation.

"I resolutely condemn an act of provocation in front of the building of the Embassy of Poland in Kyiv," he tweeted on April 3. "It is nothing else but another provocation, a sinister attack on our friendship. People with a sincere heart will never insult the symbols of other nations."

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Unknown people are reported to have burnt the Polish flag near the Polish Embassy in Kyiv on April 2.

Poland's Ministry of Foreign Affairs also reacted to the incident.

"Following the demonstration which took place outside the Polish Embassy in Kyiv on April 2 and the ensuing burning of the Polish flag, Ukraine's deputy ambassador to Poland was summoned to the Polish Ministry of Foreign Affairs, and presented with a note of protest," the ministry said in a statement on its website.

What is more, the Polish Ministry of Foreign Affairs expressed its indignation at the "ostentatious conduct of the demonstrators, and the failure of Ukrainian security officers to react properly."

The Ukrainian Embassy official assured the Polish MFA that the Ukrainian government had condemned this disgraceful act, and ordered the competent services to take action that would lead to identifying the perpetrators and bringing them to justice promptly.

"The Polish Ministry of Foreign Affairs is especially concerned about the fact that it has been yet another anti-Polish incident in Ukraine in the course of recent weeks," the ministry said.