Iceland has summoned US Ambassador Billy Long after President Donald Trump shared a map on social media that appeared to place Iceland and several other countries under the American flag. Iceland’s Foreign Minister Thorgerdur Gunnarsdottir called in Long on Monday to raise concerns over the post, local broadcaster RUV reported. Long formally took up his post in Iceland only last month.

The map showed the United States, Canada, Greenland, Iceland, Mexico, Central America and the Caribbean covered by the US flag. The entire landmass on the map was labelled “United States of America”. Trump shared the image on his Truth Social account without giving any explanation.

Iceland’s Foreign Ministry said the US ambassador was summoned to make clear that the post was not acceptable. “The position was clearly expressed that the post was completely inappropriate,” the ministry told RUV.

The US State Department, along with the US embassies in Copenhagen and Reykjavik and the US consulate in Nuuk, did not immediately respond to requests for comment. Iceland’s Foreign Ministry also did not respond to a separate request for comment.

Trump’s post comes amid continuing tensions over his repeated calls for the United States to acquire Greenland. Greenland is a semi-autonomous territory of Denmark. Trump has argued in recent years that the US should take control of the strategically important Arctic island. His comments have created friction between Washington and Copenhagen. The two countries are founding members of the NATO. The issue has also caused wider concern across Europe.

Trump’s interest in Greenland has also featured in political discussions in Iceland. The country voted last month against reopening talks on joining the European Union in a referendum. Trump’s plans for Greenland were part of the wider backdrop to the debate.

Some supporters of restarting EU membership talks pointed to concerns on the reliability on the United States. They argued that closer ties with the European Union could provide Iceland with greater security and stability. Analysts, however, said domestic economic issues played the main role in shaping the referendum result.

Trump shared the map just hours after the European Commission announced a €200 million ($232.50 million) investment in Greenland. European Commission President Ursula von der Leyen announced the investment during a visit to the territory.

The latest incident has added to the diplomatic unease surrounding US statements about Greenland and the wider Arctic region. Iceland, which has close ties with the United States and is also a NATO member, has made clear that it did not consider Trump’s map appropriate.

Danish Prime Minister Mette Frederiksen also addressed the issue while speaking to Danish news agency Ritzau in Nuuk. She said Greenland’s government and people’s position had remained consistent in rejecting any move to become part of the United States.

“The Greenlandic government and the Greenlandic people have said again and again that they do not want to be American,” she said. “I hope no one is in any doubt about that, either in the United States or the rest of the world.”

The diplomatic spat comes at a sensitive time for relations between the US and its European allies. Trump’s continued focus on Greenland has already raised concerns in Denmark and across Europe. His latest social media post has now drawn a direct response from Iceland, with the country’s foreign ministry formally telling the US ambassador that the map was inappropriate.