The Ministry of Foreign Affairs summoned top U.S. diplomat Mark Stroh, the U.S. chargé d’affaires in Denmark, to a meeting on Wednesday to convey that any attempts to interfere in the kingdom’s internal affairs are unacceptable.

The meeting, as stated by the ministry in an email, was prompted by reports from the Danish Broadcasting Corporation (DR) detailing the activities and alleged attempts to infiltrate Greenland by three American men with connections to former U.S. President Donald Trump.

The discussion included Jeppe Tranholm-Mikkelsen, Head of Department of the Ministry of Foreign Affairs, and Mininnguaq Kleist, Head of Department for Foreign Affairs and Research of Greenland. The Kingdom of Denmark emphasized its expectation of full respect for its sovereignty and internal affairs.

DR reported, citing anonymous sources, that the men are attempting to infiltrate Greenland, which has been of interest to the U.S.. DR has been unable to confirm whether the men are acting independently. The White House has not responded to inquiries about whether the U.S. government directed U.S. citizens to conduct influence operations in Greenland.

A representative from the U.S. Embassy in Copenhagen stated that the U.S. government does not control the actions of private citizens and that individual Americans may have interests in Greenland. Mark Stroh is the American chargé d’affaires at the U.S. Embassy in Denmark. The U.S. currently has no ambassador in Denmark after Alan Leventhal left the post in January.

Such summonses of representatives from allied nations are infrequent. A similar event occurred in May when Lars Løkke Rasmussen had the Ministry of Foreign Affairs summon the then-American chargé d’affaires, Jennifer Hall Godfrey, following reports in the Wall Street Journal about increased U.S. espionage against Greenland. Jeppe Tranholm-Mikkelsen, Head of Department of the Ministry of Foreign Affairs, participated in that conversation as well.