According to the intelligence services Danish, at least one individual linked to the intelligence of iran, arrested on 21 October, was planning an attack against three alleged members of the arab Movement of struggle for the liberation of Ahvaz residing in Denmark.
"During the meeting we underlined that the activity, that has come to light through the investigation in Denmark, is unacceptable", Soereide said in a statement.
Following an address by Danish Foreign Minister Anders Samuelsen on Tuesday, the ministry also said that its ambassador to Iran had been recalled from Tehran for consultations. Iran's diplomatic apparatus has been busy reacting to statements from the Danish Security and Intelligence Service and the country's Foreign Ministry.
Danish intelligence chief Finn Borch Andersen said in a news conference, "We are dealing with an Iranian intelligence agency planning an attack on Danish soil".
The EU has been trying to save the deal that curbed Iran's nuclear activities in return for lifting worldwide sanctions.
ASMLA, which Iran classifies as a terror organization, advocates for an independent Arab state within the Iranian province of Khuzestan.
Denmark ordered its ambassador to Iran home following the foiled plot. "We congratulate the government of Denmark on its arrest of an Iranian regime assassin", he wrote on Twitter.
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Ahead of the sanctions targeting Iran's oil and banking sectors taking effect November 4, Iran has been intensively negotiating with Europeans for a new mechanism to mitigate the impacts of the measures, which have already spread panic over soaring prices among ordinary Iranians. Bahram Qasemi, a spokesman for Iran's foreign ministry, called the accusations "a continuation of enemies' plots to damage Iranian relations with Europe at this critical time".
"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.
Rasmussen tweeted a message of thanks to the United Kingdom government for its support, posting a picture of his meeting with British Prime Minister Theresa May and saying Denmark would work "in close collaboration" with the United Kingdom and other countries to "stand up to Iran".
Tehran has blamed the group for a terror attack on a military parade in the Iranian city of Ahvaz on September 22 that left at least 25 people dead.
Iran has since carried out several operations in Iraq and Syria in retaliation.