Foreign Minister Sergey Lavrov said Russia is "seriously worried" about the prospect of a military action against Iran and is doing all it can to prevent it.
"The consequences will be extremely grave," he said at a news conference. "It’s not going to be an easy walk. It will trigger a chain reaction and I don’t know where it will stop."
Lavrov said an attack on Iran would send refugees streaming into its Caspian Sea neighbor Azerbaijan and further on to Russia.