-blames Russian invasion for disrupting production
Ukraine exported more than $140 million of wheat to the US before the pandemic, with latest disruptions adding to price woes.
Russia's invasion of Ukraine has worsened global food supply shortages.
An expert told the UN that the world has about only 10 weeks of wheat supplies left.
US Secretary of State Antony Blinken blamed Russia for holding food "hostage" as a war strategy.