(CNN) Danish authorities have accused the Iranian agents of attempting to carry out a plot to assassinate an Iranian-Arab opposition figure on Danish soil.

The alleged attack had meant to target the leader of the Danish branch of the separatist Arab Struggle Movement for the Liberation of Ahwaz (ASMLA), Danish Foreign Ministry spokeswoman Anne Møller Ege told CNN.

The group, which Iran classifies as a terror organization, advocates for an independent Arab state within the Iranian province of Khuzestan.

Denmark has summoned Iran's ambassador, Morteza Moradian, following the alleged "assassination" attempt by an Iranian intelligence agency, which the Nordic country's foreign minister called "completely unacceptable."

"An Iranian intelligence agency has planned an assassination on Danish soil. This is completely unacceptable. In fact, the gravity of the matter is difficult to describe. That has been made crystal clear to the Iranian ambassador in Copenhagen today," Foreign Minister Anders Samuelsen, said in a statement released Tuesday.

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