Germany, France and the United Kingdom have suspended their bilateral air transport agreements with Iran in response to Iran's military support for Russia. They have also imposed sanctions on the state-owned airline Iran Air.
The background is the delivery of Iranian ballistic missiles to Russia, which represents an escalation of the Russian war of aggression against Ukraine. Iran Air is accused of transporting electronics and technology to Russia in circumvention of sanctions. The airline regularly serves several European destinations, including Frankfurt, Hamburg and Vienna.