Iran has designated the armies of European countries as “terrorist groups,” the parliament speaker said Sunday, in retaliation for the EU’s move to apply the same label to Iran’s Islamic Revolutionary Guard Corps (IRGC).

Lawmakers wore the green uniform of the Guards in a display of solidarity at the legislative session, where they chanted "Death to America," "Death to Israel," and "Shame on you, Europe," state television footage showed.

Slamming the bloc's "irresponsible action," speaker Mohammad Bagher Qalibaf said that under "Article 7 of the Law on Countermeasures Against the Declaration of the IRGC as a Terrorist Organization, the armies of European countries are considered terrorist groups."

It remained unclear what immediate impact the decision would have.

The law was first passed in 2019, when the U.S. classified the Guards as a terrorist organisation.