'NOT DIAMONDS OR GOLD'A Ukraine official told Reuters Ukrainian law prohibits any voluntary trade between Ukrainian producers, including grain farmers in the occupied territories, and Russian entities. The June 11 letter said Bangladesh can face "serious consequences" of sanctions for taking deliveries of "stolen grain", and that such purchases fuel "humanitarian suffering." The sanctions regime was designed to act against activities that undermine the food security of Ukraine including transportation of "stolen Ukrainian grain" and "any proven involvement of vessels in shipping stolen Ukrainian grain could provide the basis for future restrictive measures," she added. Russian grain transporter Rusagrotrans says Bangladesh was the fourth largest buyer of Russian wheat in May. Ambassador Polishchuk told Reuters their intelligence shows Russia mixes its grain with that from occupied Ukrainian territories to avoid detection.