Russia has suspended its memorandum of understanding on air safety over Syria with the United States following the US missile attack on the Sha'irat airfield, the Russian Foreign Ministry said Friday. 
"Russia suspends the memorandum on the prevention of incidents and ensuring air safety during operations in Syria reached with the US," the ministry said in a statement. 
"Russia will demand an urgent UN Security Council meeting after the US airstrike on a Syrian aviation base," said Viktor Ozerov, head of the Russian Federation Council's defense committee, according to Russian News Agency RIA. 
"Cooperation between the Russian and US militaries may be shut down after the US strike," Ozerov said. 

Source : QNA