ISTANBUL—Turkey’s defense chief unveiled a new control center where Russian, Ukrainian, Turkish and United Nations officials are set to monitor exports of Ukrainian grain through the Black Sea under an agreement reached last week, and signaled Turkey’s intent to make sure that shipments start moving.
The grain export deal, which could free millions of tons of grain needed to alleviate a global food crisis, is clouded by uncertainty after Russia launched a missile attack on the port of Odessa, one of the key grain-exporting ports covered under the agreement.