Danish authorities said on October 30 they suspected an Iranian government intelligence service had tried to carry out a plot to assassinate an Iranian Arab opposition figure on their soil.
"During the meeting, we underlined that the activity that has come to light through the investigation in Denmark, it is unacceptable", Foreign Minister Ine Eriksen Soereide said in a statement.
"That kind of behavior needs to stop, and we have offered our support and effort to help the Europeans in preventing these kinds of assassination attempts from taking place", he told Fox News Radio.
Shortly after being summoned by the Iranians, Ambassador Danny Annan was recalled by Copenhagen and left the country, Danish officials said. Iran's diplomatic apparatus has been busy reacting to statements from the Danish Security and Intelligence Service and the country's Foreign Ministry.
Danish Foreign Minister Anders Samuelsen accused the Iranian government of being behind the attempted attack.
The alleged attack was meant to target a leader of the Danish branch of the Arab Struggle Movement for the Liberation of Ahvaz (ASMLA).
This movement is suspected by Tehran of having participated in an attack on a military parade which had killed 24 people on September 22, in Ahvaz, capital of the iranian province of Khuzestan has a majority arab, near the iraqi border.
The official also warned against "hasty and controversial actions".
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Denmark ordered its ambassador to Iran home following the foiled plot.
U.S. Secretary of State Mike Pompeo in a Twitter post "congratulated" Denmark on arresting what he called "an Iranian regime assassin".
Meantime, the Danish envoy said that he has been summoned to Copenhagen for consultation and that he will try to raise and follow up Iran's expectations. The group is branded a terrorist organization by the Iranian government.
Tehran accused Denmark, along with the Netherlands and the United Kingdom, of "hosting several members of the terrorist group" that Iran holds responsible for an attack in the city of Ahvaz in southwestern Iran that killed 24 people.
Iran's Foreign Ministry strongly denied the plot allegation, calling it part of enemy plans aimed at damaging Iran-EU relations.
Danish Prime Minister Lars Lokke Rasmussen on Wednesday met with other Nordic heads of government in the hope of securing a unified response to Iran. "Our support (to the agreement) will continue as long as Iran adheres to its commitments", she said.
"We deplore any threat to EU security and take every incident extremely seriously, and therefore we stand in solidarity with the member state concerned, in this case Denmark", Maja Kocijancic, a spokeswoman for the European Commission, told reporters.
The so-called Islamic State group and a separatist Arab group claimed responsibility, and Iran staged several operations in Iraq and Syria in response.