After a Russian surveillance plane breached its airspace, Denmark summoned Russia’s ambassador, Danish Foreign Minister Jeppe Kofod said on Sunday, a day after Sweden disclosed a similar violation.

On Sunday, Danish Foreign Minister Jeppe Kofod tweeted, “The Russian ambassador is summoned to the foreign ministry tomorrow,” revealing a “new Russian breach of Danish airspace.”

According to the Danish government, the Russian plane entered Danish territory on Friday east of the Danish Baltic island of Bornholm before flying into Swedish airspace.

Sweden’s defense officials announced the violation on Saturday.

“This is completely unacceptable and extremely worrying in the current situation,” Kofod said, referring to Russia’s invasion of Ukraine and the tensions between Moscow and the NATO, of which Denmark is a member country.

The minister told Danish news agency Ritzau: “We are in a special situation across the whole of Europe. That is why, of course, it is really serious when we see Russia violating our airspace. Therefore, we have called in the Ambassador so that we can make that view clear to Russia.”