He also said he had agreed with Iranian President Hassan Rouhani on the beginning of joint work on decoding the black boxes of the Ukrainian plane that was shot down this week. He also urged Ukraine's international partners to be united and persistent until the investigation was complete.
Iran said on Saturday its military had shot down a Ukrainian plane killing all 176 aboard in a "disastrous mistake," saying air defenses were fired in error while on alert after Iranian missile strikes on U.S. targets in Iraq.