The report on the tragedy appeared on the BBC’s website featuring a map of Ukraine, which had the country’s territory colored yellow.

The rest of the map was grey, including Crimea, which Kiev still considers part of Ukraine despite the peninsula rejoining Russia following a referendum in 2014. The Ukrainian authorities didn’t recognize the vote, insisting that Crimea had been illegally occupied and annexed by Moscow. The Ukrainian stance is fully backed by the UK and other Western nations, who imposed sanctions on Russia due to the move.

The idea that the UK’s largest broadcaster may think otherwise and would describe Crimea as Russian territory has stunned the Ukrainian embassy in London.

“It’s hard to believe our eyes,” the diplomats wrote in a tweet, which included a screenshot of the BBC’s map. They expressed hope that what had happened was nothing, but “an ordinary blunder.”

Ukrainian internet users also lashed out at the BBC, saying that the broadcaster only “added insult to injury” for Ukraine as the country announced a day of mourning after the deadly tragedy. The crash, which happened on Friday night near Kharkov, took the lives of 26 people, mostly cadets of the local Air Force University.

Some tweeters also blamed the broadcaster for recognizing what they called “annexation of Crimea by Russia.” There were even those who went as far as suggesting that the BBC was in Putin’s pocket.