MOSCOW (Reuters) -- Russian President Vladimir Putin spoke to U.S. President Donald Trump for 50 minutes on Saturday, condemning the Israeli military operation against Iran and expressing concern about the risks of escalation, the Kremlin said.

"Vladimir Putin condemned Israel's military operation against Iran and expressed serious concern about a possible escalation of the conflict, which would have unpredictable consequences for the entire situation in the Middle East," Kremlin aide Yuri Ushakov told reporters.