Hungary and Slovakia have complained to the European Commission that Ukrainian sanctions on the Russian oil company Lukoil are in violation of an association agreement with the European Union. A spokesman for the commission confirmed on Tuesday the receipt of a letter of complaint from Hungary and Slovakia concerning a ban on the transit of oil from Russia via Ukraine. For days Hungary and Slovakia have been accusing Ukraine of violating an association agreement with the EU by restricting the transit of oil. This agreement stipulates that the transit of energy products must not be hindered. Si…