The head of the European Union, Ursula von der Leyen, says Russia is trying to provoke a world food crisis by attacks on Ukraine ports and infrastructure, and preventing the export of 20 million tons of foodgrains. She said the EU was working to get these foodgrains out of the country. Mr. Scholz, the German chancellor on a visit to Africa, also pointed out that the Russian attacks were having serious effects with food shortages in many African countries.