He also said Ukrainian grain exports had fallen by almost 3 million tons per month since July 18 — one day after Russia quit the U.N.-backed Black Sea grain export deal.Since July 18, due to Russian attacks on Ukrainian ports, 105 port infrastructure facilities have been damaged and partially destroyed. As a result of strikes on the ports of the Danube cluster and the blocking of seaports, grain exports to Asia, Africa and Europe were reduced by almost 3 million tons per month,’ Kubrakov wrote on Facebook.