Abbas Araqchi, Iran’s foreign minister, says that in a phone conversation with his Bulgarian counterpart, he protested Sofia’s decision to station American military aircraft at the “Bezmer” airbase and called for an immediate review of that decision.

Iran’s Foreign Ministry, quoting Mr. Araqchi, said that Bulgaria’s government’s approval for the deployment of American military aircraft with the aim of supporting military operations is, from Tehran’s perspective, “condemnable, unacceptable, and contrary to the traditional and friendly relations between the two countries.”

The Iranian foreign minister, citing UN General Assembly Resolution 3314 on the definition of aggression, said that making a country’s territory available to another country to carry out a military action against a third country is considered an instance of “an act of aggression.”

Last week, Bulgaria’s parliament approved the government’s proposal to station US military forces, including several refueling aircraft, at the country’s airbase for a limited period. The United States and Bulgaria have a joint defense agreement dating back to 2006, and the Bezmer military base is located 260 kilometers southeast of Sofia.