Sberbank has taken legal action to recover debt and penalties from Glencore Energy UK Ltd over the two consignments, supplied by a subsidiary of Russia's largest bank in March. They were worth roughly 58 million euros ($62 million) each, according to Moscow court filings.

"Glencore is refusing to pay, citing sanctions," Sberbank First Deputy Chairman Alexander Vedyakhin told reporters.

"There are different ways of working without violating sanctions... This issue could have been resolved, but unfortunately Glencore is refusing any communications with us."

Glencore did not immediately respond to a request for comment on Monday.

The trader this month asked the Moscow court to move the case to Singapore.

In March, as Western sanctions over Russia's actions in Ukraine started coming into force, Glencore said it would not enter into new trading business in respect of Russian-origin commodities unless directed by the relevant government authorities.

It also said it would honour its legal obligations under pre-existing contracts, subject to complying with all applicable sanctions.

($1 = 0.9413 euros)

(Reporting by Alexander Marrow; editing by John Stonestreet)