The US Secretary of State Mike Pompeo said on Monday the United States has made clear to Turkey that its purchase of Russian S-400 missile defense systems would endanger the security of US military technology and personnel.
Pompeo said he has urged Turkey to resolve the S-400 issue in co-ordination with the United States.
"Despite our warnings, Turkey moved ahead with its purchase and testing of the S-400 system from Russia. Today’s sanctions on Turkey's SSB demonstrates the US will fully implement CAATSA. We will not tolerate significant transactions with Russia's defense sector," Pompeo said in a tweet.
[Reuters, Pompeo Twitter]