Germany has bowed to pressures from the United States to ban an Iranian airline accused of ferrying weapons and advisers to help support President Bashar Al-Assad’s forces in Syria’s civil war.

A senior German government source told Reuters on Monday that the German government had revoked the landing rights of the airline, Mahan Air due to suspicions that it was being used for military purposes by Iran’s Revolutionary Guards.

Although the measure does not constitute the imposition of general sanctions against Iran, the withdrawal of Mahan’s operating license, which was first reported by Sueddeutsche Zeitung follows a concerted campaign by the US, which first listed the airline as a sanctions target in 2011.

Several European countries have also been under sustained US pressure to re-impose sanctions on Iran since President Donald Trump pulled Washington out of a nuclear non-proliferation treaty it had reached with Tehran in 2018.