Slovakia, Hungary say Ukraine has halted Lukoil's Russian oil transit

• Ukraine introduced sanctions against Lukoil in June
• Slovakia, Hungary still receive Russian oil from other sources

PRAGUE/BUDAPEST, July 18 (Reuters) - Slovakia and Hungary said they have stopped receiving oil from key supplier Lukoil (LKOH.MM) after Ukraine imposed a ban last month on the transit of resources from the Russian energy company via its territory.--