According to Germany intelligence services, Iran allowed the Syrian regime to deployed military aircraft on its territory.
The report from the German intelligence says that Iran and Syria signed the agreement in November 2012, which enabled Syrian President Bashar al-Assad to deploy most of his air force in Iran and to use it in case of necessity."
It was also reported that Iran sent to Syria elite units of the Revolutionary Guards to assist the regime in Damascus in its war against the rebels.
Previously, Germany rejected President Bashar al-Assad's offer to play the role of a mediator in the Syrian conflict.
Putin made his first public comment on the subject of the recent decision of US President Donald Trump to recognise Jerusalem as the capital of Israel