Meanwhile, a July 22 U.N.-brokered deal to unblock Ukrainian grain exports had an initial success as the first loaded ship since Russia's invasion safely anchored off the Turkish coast.
The vessel, the Sierra Leone-flagged Razoni was at the entrance of the Bosphorus Strait, which connects the Black Sea to world markets, around 1800 GMT on Tuesday, some 36 hours after leaving the Ukrainian port of Odesa.
A delegation from the Joint Coordination Centre (JCC) in Istanbul, where Russian, Ukrainian, Turkish and U.N. personnel work, is expected to inspect the ship at 0700 GMT on Wednesday, Turkey's Defence Ministry said.