Belarus President Alexander G. Lukashenko said he would not tolerate Russian blackmail, as talks started in Moscow on a natural gas dispute.
The European Commission and Germany have urged Russia and Belarus to settle their differences quickly. A similar dispute between Russia and Ukraine in January disrupted supplies to European consumers.
Russian state-owned oil company Gazprom is seeking a share of Belarus' pipelines and higher gas prices. It has threatened to cut supplies to Belarus, which has implied that it could intercept European supplies that cross its territory.