Moscow - Russia on Tuesday accused Washington of being reckless with new sanctions on Iran, saying Moscow stood in solidarity with Tehran.
"US authorities should think hard about where this reckless course of action can lead," the foreign ministry said in a statement.
"It is capable of not only destabilising the Middle East but undermining the entire system of international security," the ministry added.
"There is an impression that Washington is 'burning bridges.'"
By introducing sanctions against Iran's supreme leader Ayatollah Ali Khamenei and top military chiefs, Washington is seeking to "punish those who are not going to submit to American diktat," Moscow said.