Bunge Ltd and Archer Daniels Midland Co, two of the world’s top agricultural trading houses, said recently that political tensions in Ukraine, a major grain exporter, were not affecting operations but that they were monitoring the unrest.

“We have not seen any significant impact to business and continue to monitor the situation,” ADM said in a statement.

U.S. grain futures have climbed on concerns about potential trade disruptions in Ukraine.

ADM, which has port facilities, an inland grain elevator system and an oilseed processing plant in Ukraine, said its primary concern was the safety of its employees. All were safe, according to the company.

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